Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3036d7c722fcf98…

MALICIOUS

PDF

50.2 KB Created: 2020-08-08 08:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8530aee8dca0660ff748e34a80987366 SHA-1: 0d75558dbdf90c7350c0036e185ed83363407ae3 SHA-256: a3036d7c722fcf98789d4f6c0c76b86d067196025d33e4dc0ba7d1e7ec6ac3f1
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with one link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to retirement planning and includes the malicious URL. The presence of numerous PDF links suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=fers+retirement+planning+guide+2020+pdf In PDF document text
    • http://xejifa.biotaresearch.com/uploads/1/3/1/4/131454012/xuvuginavorubatu.pdfIn PDF document text
    • http://files.mod-el.org/uploads/1/3/1/4/131453990/lelajud.pdfIn PDF document text
    • http://wevato.channelcenter9.com/uploads/1/3/1/4/131407406/dijaniranesadavovete.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/1/0434/3798/1852/files/certificate_of_completion_and_compliance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9140/9561/files/power_electronics_mohan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/momewegis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/wexewupinedevaxolodato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5477/5970/files/97483521157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/wuperos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/6615/0303/files/budismo_zen_libros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/the_hobbit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1776/2973/files/clicker_heroes_codes_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/15901510817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/dumixof.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

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEF 5588 bytes
SHA-256: 0d016821b93450fb86169592d76c331759955c7f1b378edee9843ddda27bc881
font_01_sfnt_off00008edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDC 14576 bytes
SHA-256: f461b88f19a7c4fa262ae8004e850c2cf7740d48bd68b752f4e74fa95d0d13bb

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