Malicious PDF — malware analysis report

Static analysis result for SHA-256 4387bf5aebf433c0…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 21:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5e03d20cb90a62d724a9773dd1ec4ac2 SHA-1: 5c17b680d33d8a7b265c98242af83394cb5beb97 SHA-256: 4387bf5aebf433c0ad3091ed048922a000618f3bcf0d4ec294434435f0849b90
194 Risk Score

Malware Insights

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

The PDF file contains a lure for a "free forklift checklist template" and embeds a significant number of external links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at ttraff.ru, indicating a potential phishing or malware distribution attempt. The document body itself is heavily obfuscated but contains the malicious URL.

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=free+forklift+checklist+template In 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/1/0437/1903/2984/files/26080957670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/82401842671.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5192/6183/files/96043631613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/download_tutorial_photoshop_cs3_bahasa_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/4981/9816/files/verizon_stock_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/89468807085.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1a04c1735e534a769bc333a6f7d715d1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3aee12_e32f9654ec7b40c497c90ac05f1dc10b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4bb894_f983b478bfdc4996925e98ac936fb493.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b1017a7d1e614278aeca2023679385cf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/agents_of_social_control.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5208/3873/files/64223854567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/business_meeting_agenda_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9265/4745/files/tukiwefusesatopejenu.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 1

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_off000064c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C5 5276 bytes
SHA-256: 21182032d9cd92f11a1137c7b4fbe98a87119ad8e5c858f846bf07adbc590b69
font_01_sfnt_off00007692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7692 9892 bytes
SHA-256: c9e0b9ec9c29113a2e3554fd8846853432050c46e5d1b5c069a51e853b7b86e5

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