Malicious PDF — malware analysis report

Static analysis result for SHA-256 018ed761a31b1d42…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 09:27:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b21c96b5c8d94e70e5fb01f98cfc7162 SHA-1: 253e8ab103c0fc0ea8f8cc2aadc1d94bb05c072d SHA-256: 018ed761a31b1d426c00a87d4243eb47ef6557f7785dfa6febe6b311a8262ae2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a link to a known malicious redirector infrastructure, specifically 'ttraff.ru', which is likely used to deliver further malicious content. The document body, though heavily obfuscated, contains keywords related to 'Comcast digital adapter' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of embedded links, many pointing to benign-looking PDFs, indicates a link farm strategy, potentially for SEO poisoning or to obscure the primary malicious destination.

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.ru/wix?keyword=comcast+digital+adapter+channel+line
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_b6f2e82f2056476c8f128984f862d88f.pdf
    • https://static.usrfiles.com/ugd/dc98cc_a451e645f2e74ba58974d87bd8da19a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7cb16004dc34b68829adf39274f820c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1b405fb8ba84b7eadd8756f7b612aad.pdf
    • https://static.usrfiles.com/ugd/b8c837_b11e002cb2c94ac19d58f412c992f902.pdf
    • https://static.usrfiles.com/ugd/4d400c_5457ae89d2fd4ec3b8a6c7c55c83e6e4.pdf
    • https://static.usrfiles.com/ugd/09273f_b02e97994c3f4915aef09abe03c99fcd.pdf
    • https://static.usrfiles.com/ugd/63d3ad_814aaab67c2f45719b738a67ce7fef85.pdf
    • https://static.usrfiles.com/ugd/b8c837_83436729d6a443aeac63060c6f9c6c93.pdf
    • https://static.usrfiles.com/ugd/b8c837_d16b9d2c77d5454a941cd3e21d0d2f7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_88f9f808c7174413afa36194e9306ed1.pdf
    • https://cdn.shopify.com/s/files/1/0437/2214/5943/files/camera_translator_app_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0096/files/lekosaluketotiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6652/2790/files/minecraft_seed_mapper.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c7.bin
ecf1b0f431f310dc11624175276f087f71aee9725f93f711f2082699ae29509e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C7 5392 bytes
font_01_sfnt_off000073eb.bin
8e59655ad23d333bc1ae2655260e21cdc9455424c87508024bba5f895bad0e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EB 10836 bytes

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