Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a4bb6eb55886e1…

MALICIOUS

PDF

45.9 KB Created: 2020-07-31 16:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d5c43fe61ba4dfb27724e3a64497fb9 SHA-1: d37f0fa32c0a29a0c81309685077fa71b63d7808 SHA-256: 51a4bb6eb55886e1fc9787f63dc382fe806143fa38c93ec9b88e71ed1d14c735
194 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=ender+3+start+gcode', suggesting a lure to a malicious site. The presence of numerous Shopify links, some confirmed benign and others unknown, indicates a broad distribution strategy. No scripts were extracted from this sample.

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=ender+3+start+gcode In PDF document text
    • http://files.pound4poundathletics.com/uploads/1/3/1/8/131871816/2091625.pdfIn PDF document text
    • http://files.mauriceparent.com/uploads/1/3/0/7/130738614/64e172e7e.pdfIn PDF document text
    • http://files.darlingyoga.com/uploads/1/3/1/3/131398406/xekigotam.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/1/0428/9835/8432/files/vuvitew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/mipoxomowanemusabasam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9958/4680/files/rekoninisituxunefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5555/3432/files/20818617548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4637/8404/files/29221420955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/jekuwepoxivomafexobipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/88573142180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5280/1954/files/18389709918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/71143417673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4065/2960/files/80645244194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.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_off000065a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A0 4936 bytes
SHA-256: 67d48d0b216559c747459a65b2514e922fd25f5b7f5339fd3f1226f9b7851fbc
font_01_sfnt_off00007660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7660 11832 bytes
SHA-256: c7701b0b682c93ce33844f5526177be677f2307be54f756fd3cfb022cda76b20
font_02_sfnt_off00009cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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