Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ce56925bbd6f70…

MALICIOUS

PDF

43.2 KB Created: 2020-08-19 21:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca9aab79e1dfed4f5e53083ed7bd3b1e SHA-1: e101dfa283c0d0a144c7479867f48d7d3dad8a14 SHA-256: a0ce56925bbd6f708ddecc344029aeedb3f850d4d06a9f643ff0e18ae592ae39
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). The document body, though heavily obfuscated, contains text related to interview questions and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly indicates maliciousness.

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=dietary+aide+interview+questions+and+answers In PDF document text
    • http://files.northernmichiganlivestock.com/uploads/1/3/2/6/132680852/4091227.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/1/0434/8870/6717/files/92266567603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/debabipupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8104/7965/files/39404210722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/anatomy_of_hand_and_wrist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/nirinedum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/gafigagurofuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0599/1322/files/black_mirror_season_1_parents_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/80595734056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/30516797783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5917/3784/files/dizuwiwak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/tivarojozafuvalur.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 3

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_off00006b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B97 5168 bytes
SHA-256: 7bb73ed1a52eaafb3d6bced191063be2cec0e8110e3132a5657ede226d05807e
font_01_sfnt_off00007d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D51 10164 bytes
SHA-256: 18188b3f871955f4eb05c73f5ec1a6209f81a378185f39ad9c050d975170b131

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