Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e894e9cd2b6aa3…

MALICIOUS

PDF

37.4 KB Created: 2020-08-25 16:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6586b4fce3f69612e0147a5cd12fc92d SHA-1: 4d2a92cfc81e23aa8a341b3d80803a3c7e0faaf8 SHA-256: 81e894e9cd2b6aa30ae4b7576135c5e4f40821fe764a571e2dddd6983924a872
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector service (ttraff.cc) which is flagged as malicious. It also hosts a large number of external PDF links, suggesting a link farm or SEO abuse tactic. The ML classifier strongly indicates maliciousness, and the overall structure points to a lure for phishing or malware delivery.

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=cypress+mtn+ski+report In PDF document text
    • http://files.menorthwest.org/uploads/1/3/1/4/131454501/fasoxevubagopa-bemixuseguwaba-kezejidivogote-kebulaka.pdfIn PDF document text
    • http://files.essenceofgracearomatherapycenter.com/uploads/1/3/1/3/131382387/tibuvosuvutu.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/1/0435/5905/9615/files/roxajabidexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/mivekupidawetutimosuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/26345227889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/53493310566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4132/4962/files/gabiserutimujufafusojuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8268/6370/files/redojezulufizugewebiwav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7025/5267/files/macroeconomics_5th_edition_williamson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/jikipubosofaromi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3867/7924/files/14471085213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/3375750544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/39334972703.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 5

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_off000056f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56F5 4792 bytes
SHA-256: 98efd896558ec75b60c2c254b6a8e3b8613d1743a569985546be18869140eca5
font_01_sfnt_off00006736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6736 9912 bytes
SHA-256: db273585b78e22612d6087c336c58ded4046d0433d0a083dd3e83c4123758f27

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