Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfae13131d3cb69e…

MALICIOUS

PDF

50.5 KB Created: 2020-11-02 00:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 85b13714b8551a42a94aa0eb265b1949 SHA-1: 9e793526673a5546b2acec98b9ffa47f43fae132 SHA-256: dfae13131d3cb69e7cfd66ac27795f189998a396745c7805c9e3583c94c8e50c
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified as a redirector at 'https://ttraff.ru/pify?keyword=hp+envy+700+414+bios'. The document's structure and embedded links suggest a phishing or scam attempt, likely masquerading as a free download to entice clicks. While no scripts were explicitly extracted, the PDF's nature and the critical heuristic firings strongly indicate 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.ru/pify?keyword=hp+envy+700+414+bios In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380228/normal_5f9ac7a600046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5f8c232c5a6cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5f985d9fd33db.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/1/0490/0939/3831/files/taxonoronesebojezuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/0337/8335/files/vupesosapalinopekupevon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582f557d-bddc-4938-a98f-81a50727b7f1/jay_chou_all_movies_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab2983f5-9324-4535-84ea-6bbb2882ca84/90532577915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/7853/0237/files/37299759023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf2cb9e-119d-4dc2-bc30-6b9b79705f24/86580990157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da8bdf14-330e-4c3e-9f1c-7fdb084423d5/xufotatenufaman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3205/9290/files/sample_letter_of_concern_to_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7081/5897/files/37346463022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5080/2595/files/dadibukubalivup.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_off0000845a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845A 5100 bytes
SHA-256: adf17639aad299cb7b6d1fed8d0ec2421224866c419e65c7f037e57c21f7a72f
font_01_sfnt_off000095e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E5 11676 bytes
SHA-256: 82552942c10f354ad3421462fd26d696b8f47690b4d7a4a042cb34ba38fbb5a7

Open this report in the interactive analyzer, or submit your own file for analysis.