Malicious PDF — malware analysis report

Static analysis result for SHA-256 3880f636c1c21bff…

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 21:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c9148887e8e14b35325242c970e6654 SHA-1: e306211c27fe13021853292e33a3357f965f567d SHA-256: 3880f636c1c21bfff73b6af7c508220e94914460ec46a80ef675b52531714bcd
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs but one critical link to a known malicious redirector. The document body and heuristics indicate a social engineering lure, prompting the user to install a browser extension or update. This likely leads to the user being redirected to malicious infrastructure via the `ttraff.cc` domain to download further malware or engage in credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=chrome+bookmark+backup+android In PDF document text
    • http://kivofavaj.heathershuker.com/uploads/1/3/1/4/131406269/06eb8baf.pdfIn PDF document text
    • http://files.jessicatcohen.com/uploads/1/3/1/1/131163976/8192298.pdfIn PDF document text
    • http://sitit.michalsophia.com/uploads/1/3/1/4/131438392/rumozasomifaj_bezumorunigo.pdfIn PDF document text
    • http://files.melissa-haskin.com/uploads/1/3/1/3/131382590/457807e2c7c.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/1/0429/7129/9999/files/bobcat_t450_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6334/4294/files/gre_math_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5581/6599/files/wewiguw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/29858219524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6534/files/bangalore_university_bcom_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7827/1641/files/bimipararodafepakeden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/fikomamudig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/kolezemofuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/cae_practice_tests_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/likevizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/pibosuzuwegov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/50780674158.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_off000062b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 5212 bytes
SHA-256: 21b58fe97038e4235f7e9ff48902d6899ef431d06241b4d2531d297b2214480d
font_01_sfnt_off0000743c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743C 9876 bytes
SHA-256: e73e14e50444d3f5644df65c640aef3447a61e45efe8d53920d9700c64bf00c9