Malicious PDF — malware analysis report

Static analysis result for SHA-256 be99dec03394abc5…

MALICIOUS

PDF

76.9 KB Created: 2020-08-19 12:57:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 92697e83835081e5668e02170baf631e SHA-1: 21cda11b0c089a24a1b8cd1df58319a2790438dc SHA-256: be99dec03394abc5c7be480fdaaf34c4e4f5f3eb9126d3778e76c1a2cc127692
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=medical+anthropology+study+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0437/1431/4405/files/wuselosulajeli.pdf'. The document body, though heavily obfuscated, contains the malicious URL, suggesting a phishing or redirection attempt disguised as a study guide.

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=medical+anthropology+study+guide In PDF document text
    • http://sikosow.oustalou.com/uploads/1/3/2/3/132302921/merakeravum.pdfIn PDF document text
    • http://files.meridianbodycare.com/uploads/1/3/1/8/131857193/6976761.pdfIn PDF document text
    • http://jujaxe.inclusivejourneys.com/uploads/1/3/1/4/131437462/vobajizematu.pdfIn PDF document text
    • http://files.msandtherapist.com/uploads/1/3/2/7/132710763/teseboraposil_bukoregudakag_gexegawul_zaxulowubo.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/1/0437/1431/4405/files/wuselosulajeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/53610472641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5571/8298/files/ap_world_history_study_guide_period_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/criminal_minds_the_wheels_on_the_bus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5196/5855/files/physics_powerpoint_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2036/9567/files/vmware_workstation_torrentino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1624/1831/files/16781999253.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8447/1719/files/nidupikanufalow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46456123156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5308/8921/files/lifejajim.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_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 5444 bytes
SHA-256: fa553673da23cfce8630d77c206fa4003734edea685af395ca35971b3b277ebc
font_01_sfnt_off00010406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10406 10152 bytes
SHA-256: 2a2cbf9e16a0e7fb0f71e4139c3c89790b1d5fcf1efafea4e8a183aa44f5570d

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