Malicious PDF — malware analysis report

Static analysis result for SHA-256 496d8799795e4e38…

MALICIOUS

PDF

44.8 KB Created: 2020-08-09 20:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 728741a29f8432dde5e3478fd7747550 SHA-1: d8fb2cebfd576a031e3c2ac20ec5b10cfccafb9f SHA-256: 496d8799795e4e38b9c6cc6f71488bcf8a52945a433011c18dd79bfda9d2801e
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to the URL's keyword and the wkhtmltopdf generator, suggesting a SEO-based lure. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content.

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=balance+de+materia+con+reaccion+quimica+ejercicios+resueltos+pdf In PDF document text
    • http://files.mikezichellaart.com/uploads/1/3/2/6/132680933/kopudejam.pdfIn PDF document text
    • http://files.wildemberstudio.com/uploads/1/3/1/8/131871614/novesuredi.pdfIn PDF document text
    • http://files.tangiblegreen.net/uploads/1/3/0/8/130813906/a704693c88.pdfIn PDF document text
    • http://files.southbaygymkhanaseries.com/uploads/1/3/1/6/131636689/famapeliwasuber.pdfIn PDF document text
    • http://files.irishrockboers.com/uploads/1/3/1/6/131637037/kibapamumanugut.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/1/0429/1097/4108/files/xetakokuputiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/property_and_casualty_insurance_study_guide_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/92239423158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9459/8047/files/64195251110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/zifuxaxuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/wotlk_cooking_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0906/3582/files/rikafozunikazam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/dedodibezupufema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6706/4991/files/ham_test_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/vanawaxife.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7400/2837/files/49643311601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pawatofamilafal.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 6

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_off00006d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D08 5552 bytes
SHA-256: bd71ff284c08a1f9c3fd179f53b9dc1ad4c375e351821374f37463ffcee40262
font_01_sfnt_off00007fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD3 11024 bytes
SHA-256: 0ba36e1eb3b51fc01c8c1a82a96b2a24cf19c528e7bce67a6fd58728bb41bbd2

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