Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa0901b779e0a596…

MALICIOUS

PDF

56.4 KB Created: 2020-08-03 14:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d69605861bb09564bc4e29b362487fe4 SHA-1: e6a06795266554bc9206f999240197d4ca390dc7 SHA-256: aa0901b779e0a596d65ab01e8f527131c6f06d8903cbaece86677479618bd0bb
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body text, though partially obfuscated, contains a lure related to "Cet davv previous year papers pdf" and a call-to-action phrase, suggesting a phishing or scam attempt. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=cet+davv+previous+year+papers+pdf In PDF document text
    • http://files.potomacschoolrobotics.org/uploads/1/3/1/8/131856160/9476628.pdfIn PDF document text
    • http://dizemaguw.alumadembo.com/uploads/1/3/2/6/132681443/fonom.pdfIn PDF document text
    • http://files.howesenglish.com/uploads/1/3/0/9/130969446/faneporugukuji_sadujopenosaner_loxigulufak.pdfIn PDF document text
    • http://files.pawsla.org/uploads/1/3/1/0/131070483/vetoze_raneniwitisev_kawotilavo_laritovegonis.pdfIn PDF document text
    • http://files.mrmichaelmccloskey.com/uploads/1/3/1/4/131453871/2858698.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/72387319946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4784/4000/files/mapuxopabatotufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/dining_philosophers_problem_in_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/18713145175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/13647701610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/lokelulavavasuwapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1692/8923/files/78605398961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4668/0214/files/java_tic_tac_toe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/vomuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0118/3397/files/95720662383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4464/files/63272551720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6318/0454/files/devops_tutorial.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000c24f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC24F 4624 bytes
SHA-256: bb07c81027b15ac3730cc7d0ea199e91cfd2d35540baaf0e31f68863fbe783c7
font_00_sfnt_off00006c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4A 5068 bytes
SHA-256: 1d835e8e32e9e557ac552c5ec111c72d5ad5bfb2bb3be66287ae850cb0f6a1b2
font_01_sfnt_off00007d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9B 2320 bytes
SHA-256: 7bb91423d63eb6bd7c2657278979848d60b7d38679106ec23dbd755ba6ab3d32
font_02_sfnt_off000087eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87EB 10916 bytes
SHA-256: 116d408a26a061f20a2c6043d81ee70a0c91a50364ade214943d8fffbb20e6b7
font_03_sfnt_off0000ac72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC72 16284 bytes
SHA-256: 2e6f62d03ca694d51db6438869c7089cd13619132763b45bf38b4d493cb58c16

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