Malicious PDF — malware analysis report

Static analysis result for SHA-256 d813771400668a6f…

MALICIOUS

PDF

57.9 KB Created: 2020-10-16 16:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 07f2efa9acf649f1641febb6025bfa67 SHA-1: 7ea2716882fe0cff656ab9c0e9784f3c562650c2 SHA-256: d813771400668a6fda24fa506eef8ece7a253e16956db319a830366501e7182d
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.club/pify?keyword=the+witcher+enhanced+edition+quest+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f877240c47a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f896650a62d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8985ac45346.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rotesojelunemiroto.pdfIn PDF document text
    • https://wopuremob.weebly.com/uploads/1/3/2/6/132696580/wagumo.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/pejajofedaxevaw_kozadesupuke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f8787e4a1497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5f8902f5b8609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f88de43d2b43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f88acf94dc5e.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/1/0497/4362/6403/files/82685477550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/92406496146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/6814/9926/files/kiwixijupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5083/5878/files/mercedes_benz_c_class_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/dibevibemanexewujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0483/7018/files/distribute_then_combine_like_terms_kuta_software.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_off0000a302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA302 5336 bytes
SHA-256: a83096bad3beb9b6bb12b3c80deed6a330a2a6144a6469d236bc7ac26d8e1187
font_01_sfnt_off0000b51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB51D 10956 bytes
SHA-256: 41e29de6ac2c9de055d006185a96b6e65d663a39e1270013b5e4ebeda5f9879e

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