Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f456a4a921938f…

MALICIOUS

PDF

38.3 KB Created: 2020-08-11 04:42:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43eb089474720a2c96b64b52b971d899 SHA-1: 228ee4fe20a71363ad6e0d573b9c528dc65be35d SHA-256: f7f456a4a921938f17cabc21cf24b6f5e41f18b101c6a68de6d849be34efec18
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF contains a significant number of embedded links, with one heuristic identifying it as a PDF link farm. The primary malicious link, 'https://ttraff.ru/pify?keyword=atlassian+bamboo+documentation+pdf', suggests a redirection to potentially malicious content. The document body itself is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the link-based attack pattern.

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=atlassian+bamboo+documentation+pdf In PDF document text
    • http://files.mrmacbiblebook2.com/uploads/1/3/1/4/131437980/pekid_logimilima_suxofaxaz_kudubojutedow.pdfIn PDF document text
    • http://files.positivelypinckney.com/uploads/1/3/0/9/130968967/1373947.pdfIn PDF document text
    • http://tukiwaz.geraldinemalone.ca/uploads/1/3/0/7/130775403/2991670.pdfIn PDF document text
    • http://soxavifab.mercerislandgirlscouts.org/uploads/1/3/2/7/132712615/6470714.pdfIn PDF document text
    • http://files.littlelemonmarketing.com/uploads/1/3/0/7/130740429/zepozed.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/1/0436/0654/0445/files/central_limit_theorem_proof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2891/3055/files/agile_project_management_pmi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/90005885584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/suzuvuliwopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/sirifinurigokin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/greek_mythology_creation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7704/2325/files/kudisufof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/gijapedipemotonufemej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8365/2506/files/tuberujezidixumebezepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/craigslist_in_rapid_city_sd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8605/2518/files/18047993481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/13875450028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1827/2423/files/81139363960.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57BF 5332 bytes
SHA-256: 70c824ddbb8f48bf6ccba7085738b8fa4d8490c0c16903750c794c90eea36e27
font_01_sfnt_off000069be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BE 10024 bytes
SHA-256: 3f7ba80f251bdb35137e80201b76c2e87abe7f59d050652702d59614965d86f3