Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd342d477d6609f…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 03:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 910e9d5efd332744470c53d1088bfc77 SHA-1: 43a7048a7d2bf957fb6e7ee1da5a04caaf9f115b SHA-256: bdd342d477d6609f15d4c658dfb42b4ea5c82f199da80b946da229493d596869
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=crash+by+jerry+spinelli+pdf'. The document body, though heavily obfuscated, contains references to the book 'Crash by Jerry Spinelli' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of numerous links to static.usrfiles.com, while individually benign, contributes to the overall link farm heuristic.

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.cc/wix?keyword=crash+by+jerry+spinelli+pdf
    • https://static.usrfiles.com/ugd/b58d21_66488e8d023a450985d81955ca665b6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e59049d69c4b45eb975085bc52814b9f.pdf
    • https://static.usrfiles.com/ugd/227d0f_1dceac01c963453c8905b544172f7d4a.pdf
    • https://static.usrfiles.com/ugd/a1fb72_143a216fa6ec404186ca33f277bac9b5.pdf
    • https://static.usrfiles.com/ugd/067ecb_7c3f83d1bdd64274b80dc7098a8fc0fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5cd7b02488f4d298ef00202ec2908f0.pdf
    • https://static.usrfiles.com/ugd/3f0e57_4d7eb1a2548e42ccb44f5395cb057668.pdf
    • https://static.usrfiles.com/ugd/c0b427_506b5764ccdd42f48c3eb6c5da38b248.pdf
    • https://static.usrfiles.com/ugd/4b7290_e2d13b5a529c467fa9169e812c80ef80.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_7ce83ee1e4a44cf7aca519f4aa900985.pdf
    • https://static.usrfiles.com/ugd/b8c837_c20241a9b4ca4ef0952e996806a937c2.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/55354885072.pdf
    • https://cdn.shopify.com/s/files/1/0432/4048/9122/files/batman_game_for_mobile.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58657968950.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_off00005fcf.bin
0bd44f4367c6fc9da44cc2f3906d7b86de12f55f726cc9994f84ef383505193e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCF 5352 bytes
font_01_sfnt_off000071fa.bin
5906291af4265fa0e11280f731290f221baa135501b433ca243e55fd82fc87d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FA 10268 bytes

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