Malicious PDF — malware analysis report

Static analysis result for SHA-256 0212d8ba09197d81…

MALICIOUS

PDF

43.0 KB Created: 2020-11-02 05:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 097e3df4495253e3dd6ece2cb01e6dab SHA-1: e811a1c7cd5b8ecbc3ecbdc8bf60a4af6f67af8f SHA-256: 0212d8ba09197d81c5c1d1bd1b593a594a542dda4b4e0e23484348adaee2cd81
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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.cc/123?keyword=forever+21+promo+code+february+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_5f9b44d2edd79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8f731466742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5f9a9086a8621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8d75252361c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f875cc4398d4.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/tixedujegibex/nisosevapasazafujugixapu.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/poop_sock_story.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/beeman_rs2_parts_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5654/1077/files/30437348059.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/books_of_the_bible_files.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_off000066dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DC 5672 bytes
SHA-256: a5c9ec9d40b06a8b197cff758de5c25c61e128b6195a24f5364bc5f046da5887
font_01_sfnt_off00007a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A23 10864 bytes
SHA-256: 374844c9a80a9d0d87b0b7705bcbe5af904642773d75d117656f0eb927a23fa9