Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc9fcba04d81f58…

MALICIOUS

PDF

43.6 KB Created: 2020-08-16 19:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a513a5578df049c25f5becfd01ed4249 SHA-1: 7b9973309d145133300257f01d0fe6b3b3d58e24 SHA-256: 7dc9fcba04d81f58288096fa7671faa87ea616a78bef909daed014508ec0e035
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to lure victims. The primary malicious URL is https://ttraff.ru/pify?keyword=active+and+passive+voice+practice+test+pdf, which is likely used to deliver a secondary payload.

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=active+and+passive+voice+practice+test+pdf In PDF document text
    • http://files.healthybodyhappyhearts.com/uploads/1/3/1/3/131381658/9398549.pdfIn PDF document text
    • http://files.atholtonmusic.org/uploads/1/3/0/7/130776787/279915b1.pdfIn PDF document text
    • http://files.edncf.org/uploads/1/3/0/8/130814118/ab9753.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/1/0432/2207/3508/files/22018584789.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4291/3952/files/22755282910.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/68140487003.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9606/3643/files/wilisuvudorikigese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1140/5986/files/suwoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2490/files/31982417840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5091/6247/files/our_lord_calling_your_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/60091314689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/calculus_2_sequences_and_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/emphatic_structures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/75104933353.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 7

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_off000062d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 5168 bytes
SHA-256: 0016e58cfb67ec21036e10bf947e7c80fa3946f8436e051e2bb6a77d820abdf3
font_01_sfnt_off00007477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7477 14084 bytes
SHA-256: 2545b659767a04ce989fff5a76cd3ba5dd8dc0e30b22a2ed38295dd839eee4c6

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