Malicious PDF — malware analysis report

Static analysis result for SHA-256 77fd59e9d0d0d3a2…

MALICIOUS

PDF

42.5 KB Created: 2020-08-18 23:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f15200fa89e708639cb3588d9d8b9d3e SHA-1: 655474854c6660316f9238a92f98abeef443bf98 SHA-256: 77fd59e9d0d0d3a22decd6f78f43f4a689091c24785c82a52226e631f5bf31d5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, many pointing to a redirector service, indicating a link farm or SEO abuse for phishing. The primary redirector URL is https://ttraff.ru/pify?keyword=multiplication+worksheets+with+answers+pdf, which is flagged as malicious. This suggests the document is designed to trick users into clicking malicious links under the guise of providing downloadable content.

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.ru/pify?keyword=multiplication+worksheets+with+answers+pdf In PDF document text
    • http://files.bandicootlodgecomedy.com/uploads/1/3/1/6/131607163/01d5f7769.pdfIn PDF document text
    • http://viwitibin.washingtonsfinesttea.com/uploads/1/3/2/7/132740328/3440629.pdfIn PDF document text
    • http://sugera.ameripodcast.com/uploads/1/3/2/6/132695535/bofamu.pdfIn PDF document text
    • http://files.wentworthfallsgardenclub.com/uploads/1/3/0/7/130738553/627d7.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/1/0430/4545/3985/files/61665034262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6150/2374/files/52999327441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2823/4908/files/tinenefov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/52372222575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/83965970233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/after_livro_5_baixar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/98414564124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2312/2077/files/pirudusowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2137/5387/files/mumbai_125_kilometer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/zivajujodaratupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.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_off00006762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6762 5404 bytes
SHA-256: d16f777a5b0cea76ffc656fd8d45c647af5b802d99c55099135f52532dfc0b4d
font_01_sfnt_off000079d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79D2 10348 bytes
SHA-256: de0d85655de4745ce0ad77e5e23afa603d75554621418e37763c502239de174d

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