Malicious PDF — malware analysis report

Static analysis result for SHA-256 81f30b731d3fe0b3…

MALICIOUS

PDF

44.5 KB Created: 2020-08-26 07:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b07fad3feeb72b004bbee4236ebe479 SHA-1: 7066afc73073629bc1434edf467084c80ad31d5c SHA-256: 81f30b731d3fe0b3fcb7a69c09faffe572edd35798342ce4825b1f238f3aae86
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ttraff.cc'. This suggests the document is designed to lead users to malicious sites, likely for phishing or to download further malware. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=b%25C3%25ADblia+septuaginta+online+em+portugu In PDF document text
    • http://files.kingspointpottery.com/uploads/1/3/0/9/130969131/kajorerodedimar.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/1/0433/0687/7080/files/65028435792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8376/5662/files/dicas_para_alimentao_saudavel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6818/6024/files/72852554369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5420/3031/files/free_recording_studio_business_plan_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/79238289296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93236297381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/vojogibiwegabawuzipet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/pulaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/1864221863.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/16510586592.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 2

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_off00006c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 5380 bytes
SHA-256: 587ec58f35b997ff4a414beec23a46020462c08bca5bf0835205bca1e2daf4fa
font_01_sfnt_off00007e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3B 12344 bytes
SHA-256: 6c8750ed418d8bd6b019b906fbad1649e9c7d686d5a7dec9a8f4294bec6e0825

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