Malicious PDF — malware analysis report

Static analysis result for SHA-256 8075db58dc66bf1b…

MALICIOUS

PDF

67.7 KB Created: 2020-10-15 17:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dc661deb7c7bcd7ce754c610946c0f4f SHA-1: e5f9d395c0838b6723be083e7a5cea46c0fbfcf2 SHA-256: 8075db58dc66bf1be68408284f54f72316f1348117b9900e02745a40f82f3a93
222 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/pify?keyword=california+voter+registration+card+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f87b4d3658ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f87173cc461e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f873d7605b79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f873abb4d886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f884b1480452.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/vitiregavoxofe-xaviferatavatax.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/4255750.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/1/0482/6523/2546/files/18_wheels_of_steel_american_long_haul_game_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3106/9340/files/14214833559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/1977/1297/files/tymora_goddess_of_good_fortune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/jutig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a40562f-2b2a-426b-91cf-71efcfc5dd09/taxudemuzosozutakokogibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9844/3428/files/halti_harness_vs_gentle_leader.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8722/3703/files/dnd_5e_rogue_arcane_trickster_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77d498d2-472b-411e-96a4-438cfdcc371f/kudovakelotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b73460cc-5027-40a6-8e1f-2d474dc43a64/zowozoxojewibejikoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc558b77-cbca-419a-8ba0-99545d477ad4/84959742184.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_off0000cb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6B 5288 bytes
SHA-256: ff43f3b1c4604f84ec6d618c266108f5194d68af4c7b1039e281de933515f8bb
font_01_sfnt_off0000dd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD83 10516 bytes
SHA-256: e43cab3febf4b44b12ec83a011363a18c6bf9428ee03adedd5b4b4a568c944fd