Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b8808bbc9382dd…

MALICIOUS

PDF

35.9 KB Created: 2020-08-25 04:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3fef4feb45757ce816048c9923d8214f SHA-1: 308cda0fae18474f8e8c660bff3af84ebaf2b060 SHA-256: 13b8808bbc9382ddecb7255c62b809a877416a0401dd9e09b6fe55625e539308
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 to 'ttraff.com'. This indicates an attempt to direct users to malicious sites, likely for phishing or to download further malware. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic to obscure the malicious intent.

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=synonyms+for+useful+information In PDF document text
    • http://files.5degreespsychotherapy.com/uploads/1/3/2/7/132740413/9aebaa.pdfIn PDF document text
    • http://files.mountainairdance.org/uploads/1/3/0/7/130776131/44c90c4684d.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/1/0430/3863/8241/files/latest_ielts_writing_topics_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/jesijozifoxinexuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/dazudane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7491/2410/files/69979819197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6300/8661/files/54345220538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/60487595504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/nosiguxutawowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0426/4601/files/30748962244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/45462617443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1904/1954/files/celestial_warlock_xanathar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5026/1915/files/rurolalexatatuxogibe.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_off00004fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB9 5116 bytes
SHA-256: 32fa6b65903fcc95fa92861816745796c23ae64b31969a247ef3217dbcd82c23
font_01_sfnt_off00006103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 9980 bytes
SHA-256: 5e2456fd39ac646691f485a7a01f9374fa6cc5579963db3e8dabc331888d8f53

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