Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f34fff3eeddedf7…

MALICIOUS

PDF

54.1 KB Created: 2020-10-15 17:54:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: cfdcaef97c2e7fcfe2d361d6c451797b SHA-1: f677a842d9036c4e54ae2b1cf31ea2fe1b278d07 SHA-256: 1f34fff3eeddedf7b831008eb70ce5818096c567f862190918b1c74a7b10be48
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/pify?keyword=download+discord+apk+for+windows+10 In PDF document text
    • https://fewevivib.weebly.com/uploads/1/3/0/8/130813821/1edc4e0.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/vanojiraxajerubefiza.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/14ad7f8718.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/8767144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f872d219b4ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f875f3fab50c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f880753a3a94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f872ea97a3af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8816976f0e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f87624c3ea69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f87feb621fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f87504c29eff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f87a2f82c563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f8764796c590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f8824bf0679f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f876506ce5f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f86f457325c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f86f5eeba16a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f8743fe1ffc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f88019077c7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369645/normal_5f885ade36aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f86fef5c9cad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/dc09ca8e-8e36-48b2-94b6-156c98ea03ad/kilaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c289095-9684-45ec-96c7-c42f8689b5ae/90715642383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9c526d-f3ee-4ee2-be53-90e458a4e431/7292448678.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7031 5088 bytes
SHA-256: 81c19bdd3f4b8231c92310b9568e27c204e087cdcf0f07d611e5a8376075ad2b
font_01_sfnt_off00008194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8194 10968 bytes
SHA-256: 017873a0a99d227d818122f157d282e52dfa70dd321a10c1b3f7b88a7916db66
font_02_sfnt_off0000a71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA71C 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b
font_03_sfnt_off0000bc1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC1C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378