Malicious PDF — malware analysis report

Static analysis result for SHA-256 725beca548bfd885…

MALICIOUS

PDF

41.0 KB Created: 2020-08-23 07:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 84f4c8bb9d27b886b7ed55d00bc4ec9d SHA-1: 80f4db78545f1d0a2b064e02865faae4b6a02c1a SHA-256: 725beca548bfd885b40f07efc7b5b08aa4c81a750bd8fdc3e3b46564e44b5769
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector link to 'ttraff.cc' disguised as a performance appraisal review. This suggests a phishing or scam attempt. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL and a benign-looking PDF link, reinforcing the lure.

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=performance+appraisal+review+letter In PDF document text
    • http://files.wildmillers.com/uploads/1/3/1/4/131407406/3238706.pdfIn PDF document text
    • http://labaforif.albedooshrine.org/uploads/1/3/0/8/130874493/4270492.pdfIn PDF document text
    • http://files.ncelementary.com/uploads/1/3/1/4/131453267/nevosimujutob.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/1/0433/5042/5753/files/cornerstone_chords_g.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0833/3736/files/advanced_cardiac_life_support_acls_provider_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/turovapisulasek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/pobamepopurid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6628/9302/files/93525119586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9015/3365/files/bobisixedalipekuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/62272511579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7455/9893/files/83445290275.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_off000061f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F7 5316 bytes
SHA-256: e582f5014d5772550d99c133d4a4c386b217e3723c89c09821022b06e2b8a88e
font_01_sfnt_off000073ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FF 10364 bytes
SHA-256: fb1c95958215cfc84950e3e86581bf725265970a70d395b2571d8ea7653ae771

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