Malicious PDF — malware analysis report

Static analysis result for SHA-256 021a4f34973d0105…

MALICIOUS

PDF

46.8 KB Created: 2020-08-07 00:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f2e0674c31723969bef63c0f6240701 SHA-1: b985f718fe410cd403b4f9972bb18f8e7b8eb945 SHA-256: 021a4f34973d0105cd9e80ebb2d184261640e884e36e59abc9d0213d8685571d
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to an SEO-optimized link farm, with a primary redirector pointing to 'ttraff.cc'. This infrastructure is used to lure victims with fake download prompts, such as 'Adobe pdf writer for windows 7', and ultimately serves malicious content. The ML classifier strongly indicates maliciousness, and the presence of a download button lure reinforces the phishing attempt.

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.cc/pify?keyword=adobe+pdf+writer+for+windows+7 In PDF document text
    • http://files.allisonaitken.net/uploads/1/3/1/4/131452922/zavubufoxanumajuzoru.pdfIn PDF document text
    • http://xisiwis.aampmuseum.org/uploads/1/3/0/7/130776485/malezaber.pdfIn PDF document text
    • http://files.constableweiser.com/uploads/1/3/1/4/131453034/bofom.pdfIn 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/1/0434/5800/3096/files/39660160209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/mikutasenazukafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/felepukut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6150/2374/files/newegedudonuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2341/4942/files/danny_phantom_season_1_episode_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8607/8369/files/13323142073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0565/6736/files/putifilaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4047/9131/files/convert_to_excel_small.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2944/5273/files/78691439294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/82987335019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/leading_by_example_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/dizobonexisepudateregaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3077/3913/files/2633356910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/homeostasis_biology.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 7

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECE 5236 bytes
SHA-256: 29a88c7496b0c3ffac777a833e1e7d9af63a0e682d1191a478c4f7b25fc256e7
font_01_sfnt_off00006138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 5096 bytes
SHA-256: 8f94bf21e10bb898fa753d5f842ca74a95657d4bfdc863a14dce1eb32aa4aa35
font_02_sfnt_off000072b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B5 10448 bytes
SHA-256: 64c966bf752eeab64729dcfac1dfd1ff94fd1bb906531f8de88c6f2b89c0216f
font_03_sfnt_off000096ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AC 16488 bytes
SHA-256: d6cec5d81403a3d70faea1540ef19555465bc704c2477342a2b01c02bc8a8e2b

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