Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ce629380620896…

MALICIOUS

PDF

38.1 KB Created: 2020-09-02 19:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64e609338a199c30818ddf6c29d62932 SHA-1: 35f326f13c64687ad746d649f3b224b0f448c58b SHA-256: 91ce6293806208965ca4ff1bba5fc47bb2bd67c3a5d409e6d1326aa0d113a266
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One of the extracted URLs, https://ttraff.me/wix?keyword=binary+to+ascii+converter, is identified as a known malicious redirector. The document body itself is heavily obfuscated and contains references to 'binary to ascii converter' and 'wkhtmltopdf', suggesting a lure related to technical tools. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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/wix?keyword=binary+to+ascii+converter
    • https://cdn.shopify.com/s/files/1/0438/0652/3552/files/best_anti_aging_face_sheet_mask.pdf
    • https://cdn.shopify.com/s/files/1/0438/9886/3771/files/doing_case_study_research_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/sesupig.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/ford_supplier_portal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31670740491.pdf
    • https://static.usrfiles.com/ugd/de60da_d1186ff704db4b91972cb102a26005ca.pdf
    • https://static.usrfiles.com/ugd/cd81e9_7965eb8aa67b4986a51b93a14b1c63d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b522b4db0354ce3b6b1b87d5fc3bc7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2178fc3e576e45d3806a5c0956ce27b2.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/95835374007.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/acute_cholecystitis_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005628.bin
aa5eb3a02071957701a79f27f80cc169660ad1f474dc0982d672eff4c6da04e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5628 4972 bytes
font_01_sfnt_off00006730.bin
7417534f8b1977deab6064518ca2721b1c39197666f704fa764a441537de18ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6730 10944 bytes

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