Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8266883e311c7b2…

MALICIOUS

PDF

41.1 KB Created: 2020-10-28 09:08:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: df3d58d8fa3b7c637118557476d2366a SHA-1: 5700107f61df1c5dd75750a14add33189f1fa0a4 SHA-256: a8266883e311c7b23fbaf9a4922e2ccdb0738637092f26a8e2e75dfaf98d3ab4
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/123?keyword=honeywell+water+heater+gas+valve+cross+reference In PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/7d2665a5e7dd46.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/dexiludadapex.pdfIn PDF document text
    • https://zafitageleg.weebly.com/uploads/1/3/4/4/134489703/jukatanod.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/fca1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384145/normal_5f98e4d4bada8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f926b345225a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f99156ab68f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f8d4e7362450.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006215.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006215.bin)
    • https://uploads.strikinglycdn.com/files/ad1da9c3-86bb-43e6-9dd3-28bd578fb4a0/63852023533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b864dce9-ae10-4e5f-be98-a7167a01f281/difanawulopigamakibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa426d8-57a6-4d96-9f56-d1dec50481ed/48993056940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7730/7042/files/54814328996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/waluzowipagumajadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/bivowowejelezifewaredijon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/30391202058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6848/9881/files/reloading_6.5_creedmoor_for_hunting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f767d4c-bc84-4370-a626-0a53232d3b71/33953821349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e226e67-5bf3-44fc-8297-479a8e0c054c/42148356230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf49ec66-5304-4cfc-888e-a59ceb086f59/pemuwatupon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce902e1-f0eb-4745-b071-3ee62a280f21/fukilumi.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 extracted file (font_00_sfnt_off00006215.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 5356 bytes
SHA-256: 10a4ca03cc0666b862759c0ca194cb3a87c80818ee1434b78e6367f49a6f059c
font_01_sfnt_off00007464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7464 10152 bytes
SHA-256: 365dd6a72f2c5c9d6bd212e546ea5ba0505b52ea7924878fa4a3766f000b8587