Malicious PDF — malware analysis report

Static analysis result for SHA-256 76d4577b2550ff73…

MALICIOUS

PDF

41.4 KB Created: 2020-08-06 15:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 98b66e4852ed45d58c712e70acc16529 SHA-1: 8dc29c9bb381ef1f31b70d18d4d032110f7c4d9e SHA-256: 76d4577b2550ff737fb004a1880cef12976b13ddd68ba204fd911173426b2e7b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) which is flagged as malicious. The document body, though obfuscated, contains text related to academic papers, suggesting a lure for users seeking specific documents. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially malicious sites, likely for phishing or malware distribution.

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=jurnal+keperawatan+anak+dengan+bronchopneumonia+pdf In PDF document text
    • http://files.triumphchew.com/uploads/1/3/1/6/131637570/5607441.pdfIn PDF document text
    • http://files.harristonunited.com/uploads/1/3/1/8/131856195/7559764.pdfIn PDF document text
    • http://files.nowlunenburgcounty.com/uploads/1/3/0/7/130775151/jibabutibamepag_mifaribuvano_gixajime_vebedozuz.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/1/0435/6240/1947/files/79416915788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/15830609548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/90742333387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/togomuxaverebotimosegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/82969509682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/formatar_hd_gpt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/muzikogazogew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/lipik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/73418161627.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6023/0294/files/character_sheet_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.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 4

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_off00006346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 5676 bytes
SHA-256: 24c7cfc662da61c78443e2ee290893018945f06175c4bf7edae39e0953573701
font_01_sfnt_off00007683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7683 9980 bytes
SHA-256: 7435fdffcaf8d5a08c76eea4da2d3f5e6138563f05e4ca2608bd6f63fffa0efd

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