Malicious PDF — malware analysis report

Static analysis result for SHA-256 3712180d8ea81d6c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-22 23:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e2b386395b95e9cd5f7b92029653e4cd SHA-1: 4c28521233d80d454e3f0bf20d71ea928197343e SHA-256: 3712180d8ea81d6c584446f6465d0a2796c76b04417336444b954bfd21d1620d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are designed to appear as legitimate documents but lead to a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=new+periodic+table+song'. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files hosted on various domains, suggesting a coordinated effort to drive traffic to potentially harmful sites.

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=new+periodic+table+song In PDF document text
    • http://files.buyunladylike.com/uploads/1/3/1/8/131871730/deniwekumabe_jezajix_sevibu.pdfIn PDF document text
    • http://dupovo.spikemclarrity.com/uploads/1/3/0/7/130738948/muxujerimimenoga.pdfIn PDF document text
    • http://files.jessedinkelphotography.com/uploads/1/3/1/4/131455543/6f5725393186039.pdfIn PDF document text
    • http://rulope.industri-motion.com/uploads/1/3/1/3/131380042/remupekiduvidok.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/1/0429/8830/6586/files/cluster_random_sampling_method.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/cases_in_public_relations_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/90718854371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/pejifurobumuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7652/5988/files/orlicky_s_material_requirements_planning_3_e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/fuzalok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/73487654671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/fepezononurupeziwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/goxiwubafugunugufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0163/4201/files/43895432206.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6720 5444 bytes
SHA-256: 31afeea4177fa57728ce003f13b819f21c54dff4f04defc273a8f275317803c8
font_01_sfnt_off000079c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 10008 bytes
SHA-256: f9a46e20164b44f24c41b56ebeb00c9a46efd1ebee0019007bcb5e04db01904f

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