Malicious PDF — malware analysis report

Static analysis result for SHA-256 f877f456fd082443…

MALICIOUS

PDF

57.6 KB Created: 2020-10-29 11:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 9ba6c7420cf7407bacbde7f04defcd5d SHA-1: a206dba8796c3d73c92178f23b959014c8f7b4fb SHA-256: f877f456fd0824430367d2d2db19b6954f1e7149801d53ed0f42bf662d30092c
214 Risk Score

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/123?keyword=auglaize+county+auditor+sheriff+sales In PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/6166776.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417990/normal_5f99a11496744.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • https://povelelowu.weebly.com/uploads/1/3/4/3/134331265/tesim.pdfIn PDF document text
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/laxiloz_dumufekomet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/be1cf936-ecbb-4306-b3ed-85f4c0f1b965/79964166902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b015bece-2772-4499-8f06-635de17fc3a6/foundations_of_image_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68580117-ccd4-4aea-8d8b-0551e6fd051c/present_perfect_modals_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b27f2d59-41ff-4362-a59c-1fb12bf96465/81290904214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9718e68d-3014-406a-a4bd-750d6ceef130/50546765648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee6a8798-cf45-4c25-81e9-ee781835b6d6/89424073453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf56f016-4038-4b7f-bfd5-38ecf022b597/95158949600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7488/7090/files/71825300822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4456/8989/files/scalamandre_wallpaper_hanging_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3624/4643/files/76152543091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5091/7784/files/srttrail_error_code_0x0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8651/8688/files/history_class_10_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e898ff2-5318-4aea-a7f3-2f0a1a451298/motagaxekojumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304ffe2b-413d-410e-9660-f6939a54142f/78341646170.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08d305d-47f7-4a70-89b0-76bc7fda44c7/89961546679.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_off0000a265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA265 5424 bytes
SHA-256: f811bed542c1b530a8fc1e289e3da16129c717340d1e7f17efb5b9444a8a3219
font_01_sfnt_off0000b4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E4 10600 bytes
SHA-256: 11341d49c5567acc72be104e8e78d572e046501d16da521eb6a5276468589af5