Malicious PDF — malware analysis report

Static analysis result for SHA-256 d74499a98b555e96…

MALICIOUS

PDF

43.4 KB Created: 2020-08-29 08:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9812dd9fd6700c48649547ed62d7b48 SHA-1: 1b5f88ef86e1cea0aeb1adab2775168fc07d833d SHA-256: d74499a98b555e96e76c65156a4f8c875e104df7e112a8591b1ec411be34164c
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of embedded links. One of these links, https://ttraff.cc/wix?keyword=chevy+astro+interior+dimensions, points to known malicious redirector infrastructure. The document body appears to be malformed or corrupted, but the presence of numerous links suggests a link farm or redirection attack designed to lead users to malicious sites.

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=chevy+astro+interior+dimensions
    • https://cdn.shopify.com/s/files/1/0438/3129/6160/files/setizemexogomemoto.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4657/files/badowosewakozomujap.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/6610266531.pdf
    • https://cdn.shopify.com/s/files/1/0440/1748/3934/files/vemojelodofewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/arianna_huffington_books.pdf
    • https://static.usrfiles.com/ugd/b8c837_38c8f7ec8ff14a9e93db357aff1485b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_90c24482204c473f90c40cffbede2358.pdf
    • https://static.usrfiles.com/ugd/b8c837_a054a09afd8544ad8d1f164b04f3a98b.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f0e8922dfd942efa2013882555d4d27.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/wotakamenefopezoragod.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/management_consulting_group_plc_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/2653/7883/files/zesazobapumunufukawene.pdf
    • https://cdn.shopify.com/s/files/1/0428/4717/4812/files/27228667606.pdf
    • https://static.usrfiles.com/ugd/b8c837_b107720b1cf5421ab279440d713f8153.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c4e3d1d74f947e1ae4d67666191a89f.pdf
    • https://static.usrfiles.com/ugd/b8c837_02fc83144f7545f687d0250a539dcb4b.pdf
    • https://static.usrfiles.com/ugd/b8c837_1dca233853b44c6e80c6aa52ceec16bc.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_off00006882.bin
e2b0b2e4565e16e96100e0013ac2b2400fc62553d4560cfd4b19ffc8093636a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6882 5100 bytes
font_01_sfnt_off000079b3.bin
8260322f9c2e9879474cb00e66ac7155a817b603d5583b35477873b7300373e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B3 12088 bytes

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