Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a1c3d075db13d0a…

MALICIOUS

PDF

45.9 KB Created: 2020-08-22 22:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3575fcecd90ce98c54e246ac8e8bd15b SHA-1: 0ff0d1dd34fad6ee590f4dafa92e881b0e282776 SHA-256: 8a1c3d075db13d0a23a6e20c79e03b377e7be9ce0702be20453d117ea114845f
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.com/pify?keyword=video+cutter+software+free++for+pc, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'video cutter software free for pc', suggesting a lure. The presence of numerous external links, many hosted on Shopify, indicates a link farm designed to attract search engine traffic, further supporting the malicious redirector's purpose. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=video+cutter+software+free++for+pc In PDF document text
    • http://files.kantishnaouterwear.com/uploads/1/3/0/8/130814121/3509ae21.pdfIn PDF document text
    • http://files.allriskinsmobile.com/uploads/1/3/2/7/132740628/masunubuzop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nisej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/teluluritevuzubib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/7181759389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9652/3423/files/shell_shockers_aimbot_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/wafunuzosux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/citas_apa_6ta_edicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4919/7472/files/fundamentals_of_engineering_economics_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/71811402338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8619/2546/files/46250148095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9345/9093/files/43815069451.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 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_off0000671c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671C 4952 bytes
SHA-256: 0b682218d466c4797f4fff9c7075c6e8d7c52b02b85e696beaa6239876139f38
font_01_sfnt_off0000781a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781A 10696 bytes
SHA-256: a1a03b353758f157c4b194846d53d6ccc3194e6f6f5569b8707863e7aa865010
font_02_sfnt_off00009cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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