Malicious PDF — malware analysis report

Static analysis result for SHA-256 17dfbbfc2da25ffb…

MALICIOUS

PDF

40.2 KB Created: 2020-11-04 03:44:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 3027e0aba5139932996734803e675391 SHA-1: 2f568b04b7705a544f62b2389e65321a06b14664 SHA-256: 17dfbbfc2da25ffb0fe2c227cb0df1df48597d47433b1d781bb3f34776222a0f
194 Risk Score

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.me/123?keyword=kimberly+clark+coupons+and+offers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f882afdcf65d.pdfIn PDF document text
    • https://dudikojegak.weebly.com/uploads/1/3/1/4/131406444/nogasun-vixupigi-danofu.pdfIn PDF document text
    • https://nimewoguvinu.weebly.com/uploads/1/3/4/4/134433183/1138052.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/8e829.pdfIn PDF document text
    • https://moviwinexanasi.weebly.com/uploads/1/3/4/3/134314602/1909708.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/bankruptcy_act_1967.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/8778135882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66149e3d-67a3-45c9-a5be-8813fc34ec8d/85416614313.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/cheats_for_pokemon_black_rom.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/85463129828.pdfIn PDF document text
    • https://s3.amazonaws.com/luresimosip/54782726235.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_off00005b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2F 5576 bytes
SHA-256: 5a49d541b1b417d174713e0f9bb93d556ef7c54be9d3ffd5f61e03d833474ab6
font_01_sfnt_off00006e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E12 11180 bytes
SHA-256: d383bcc9d4b2831f2d67c1bbc4ec8910f8dd7b4a695c7da78354d908ab9ee932

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