Malicious PDF — malware analysis report

Static analysis result for SHA-256 11125227540aa1b9…

MALICIOUS

PDF

51.1 KB Created: 2020-08-30 04:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26979ee079b3cd14bf700c33c185eea9 SHA-1: 6e0dc907e312e270ea87466eb94af1f66f313047 SHA-256: 11125227540aa1b9307301b6a3a3a8dcfedf154148fc3fbca9441446d046c7de
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.cc/wix?keyword=everyone+poops+hardcover, is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure the user to malicious infrastructure. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/wix?keyword=everyone+poops+hardcover
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/tojedokobegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8761/6413/files/mixagasudifadalawu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/42712580735.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/73434798782.pdf
    • https://cdn.shopify.com/s/files/1/0462/6287/8359/files/3d_logo_animation_after_effects_temp.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9212/files/47877362876.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/fivesijokerilowomer.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/siwesajanowunuxax.pdf
    • https://cdn.shopify.com/s/files/1/0433/3892/4181/files/meme_creator_and_templates_tamil.pdf
    • https://static.usrfiles.com/ugd/d1c05f_895c479a2ee4424886083a8f1f1a55a3.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_b4e3407f249e49999df5ce630fe585e0.pdf
    • https://static.usrfiles.com/ugd/67e251_5802eb50200142f7a1239b250e603740.pdf
    • https://static.usrfiles.com/ugd/0c4177_837860e554be4dd9b3f3cbcb8fb9d7de.pdf
    • https://static.usrfiles.com/ugd/b8c837_45f7ed31920c4654a82a8a0a1d4fe854.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f4b.bin
7fcdaf2858e19d1176d8e9890e68f033b250d895bb1c967e3d1e5c3d21588e8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4B 7472 bytes
font_01_sfnt_off0000886e.bin
b35134fefa5bd27f1fbccf78b649b0cadff9c001ae4923351e52da4ab5f7be72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886E 5248 bytes
font_02_sfnt_off00009a47.bin
a72b55215d852b6e98690ae4afb213c776f89e55f83a31fbc51405ad2d65e1a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A47 10980 bytes

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