Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03c40e2f78131c5…

MALICIOUS

PDF

48.0 KB Created: 2020-08-02 09:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f0a1dd6dae359d80f4edbb781255013 SHA-1: 38d7f6884568d3762efb666692b8c15cf9fb3f4c SHA-256: a03c40e2f78131c5e2e1c550c94dd141d85b6f07e744d6e387832aa2377c447b
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm. One of the primary links points to a known malicious redirector, ttraff.ru. The document body is heavily obfuscated and contains some of the URLs, suggesting an attempt to disguise the malicious nature of the content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.ru/pify?keyword=felicia+gump+vanilla In PDF document text
    • http://files.hjdewaard.com/uploads/1/3/0/7/130740625/pitilunefe.pdfIn PDF document text
    • http://files.futsal415.com/uploads/1/3/1/0/131070309/21285.pdfIn PDF document text
    • http://files.reinehauspoodles.com/uploads/1/3/1/3/131398221/zefumijawixafikodux.pdfIn PDF document text
    • http://files.adventurousschoolcounselor.com/uploads/1/3/1/8/131871501/riregaf-kafadevunik.pdfIn PDF document text
    • http://files.thesterlingstyle.com/uploads/1/3/2/7/132712614/6296944.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/1/0434/2585/7703/files/nba_2k13_cheats_ps3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8392/3609/files/11027092917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/ubuntu_server_wifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6309/1110/files/32077676050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46905239833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/90996431021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/74724875403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/tevuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/xakofit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1465/1038/files/24925747769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/36578729661.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6904 4992 bytes
SHA-256: dfc91e34ec952260b8529a9dbb656a879ea413001853301928c6fbf08ac7d852
font_01_sfnt_off00007a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A03 10412 bytes
SHA-256: f68a30f7547c01684db117b2184402402dfef478aff630b1bc923a3ee7c9219d
font_02_sfnt_off00009d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D21 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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