Malicious PDF — malware analysis report

Static analysis result for SHA-256 643f44122f8ff4b4…

MALICIOUS

PDF

41.7 KB Created: 2020-08-17 03:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dcf35ae95a5ded2351e9db3f3e83a56e SHA-1: f97b17cbe620885ee96206b661818ba270cd9eec SHA-256: 643f44122f8ff4b408f5b5c28ca7f8683143722863c0e647d2ea310abe344a6a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary redirector URL, 'https://ttraff.com/pify?keyword=allan+kardec+pdf+livros', is flagged as malicious and associated with SEO link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a 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.com/pify?keyword=allan+kardec+pdf+livros In PDF document text
    • http://wefoduf.kidsmusicbyclaire.com/uploads/1/3/0/7/130775666/zoserufo.pdfIn PDF document text
    • http://files.nehosta.org/uploads/1/3/1/8/131871698/kokajotejizelup.pdfIn PDF document text
    • http://files.mastermindandbrain.com/uploads/1/3/1/4/131406086/wubix.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/1/0437/2480/0154/files/dajinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/fawosazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/tibonedutasataxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/ravilel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/74167571461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/86935497876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3463/1579/files/marazikomepekirinojoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/mabazabiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/42447825375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/domelom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/bangla_comic_books_free_download.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 3

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_off000066a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A9 5264 bytes
SHA-256: 31095d6775e59b77fdee2c4d910951c9431e64f383747861fee2a8f2f5050f3c
font_01_sfnt_off0000789b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789B 9896 bytes
SHA-256: 422391b19e343b333286ea10f0346007057e289fa5b0e129670845154f1716df

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