Malicious PDF — malware analysis report

Static analysis result for SHA-256 19fbd78ede110228…

MALICIOUS

PDF

42.1 KB Created: 2020-08-17 04:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7b49ac79e88511a7c43d82a1372ff954 SHA-1: b72d6065f7f2356f62ed19dc5dd61d8413bf5957 SHA-256: 19fbd78ede1102282bf55aeb3cf5761a0c8368267c22e616fdd7d7eb10fbbdba
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.cc/pify?keyword=data+collection+excel+sheet In PDF document text
    • http://files.kilimanjarodreamadventures.com/uploads/1/3/0/7/130739233/torikotume.pdfIn PDF document text
    • http://files.thankgodforsex.org/uploads/1/3/0/9/130968985/eb0bb7b8e29abc.pdfIn PDF document text
    • http://files.aucoproductions.org/uploads/1/3/1/4/131406390/671142.pdfIn PDF document text
    • http://files.raleighgardiner.com/uploads/1/3/1/4/131411281/405ff7.pdfIn PDF document text
    • http://files.carolynriker.com/uploads/1/3/0/8/130814644/9761240.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/1/0433/2450/6266/files/82615716560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/matazix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/66226077100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4670/7104/files/54273372491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9270/9271/files/wiwupubodubiwibazik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5693/8658/files/30062034833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/mofebugogufarusup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/36142646750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/sigugaxirowad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/ripojekuzupos.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_off0000689f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689F 4860 bytes
SHA-256: fbebe063034d429558682f2e15d0130220c4592fc80d546e7f323f6ae0d3c165
font_01_sfnt_off00007923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7923 10028 bytes
SHA-256: 0e22916ba4c192794b9beb5e6c626e1614a6e9954e557fc7aa9dc21e4f683441

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