Malicious PDF — malware analysis report

Static analysis result for SHA-256 da10d92bd7bf66d9…

MALICIOUS

PDF

60.2 KB Created: 2020-09-19 14:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3908c7fe91fdb4dda4bf482d6e7beafe SHA-1: 6522877c373b52c0507453023310d7f4676d3008 SHA-256: da10d92bd7bf66d96b0d23766ef4d2b1e86fc8782e55c42ab731ce2500ae8a2d
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.club/wix?keyword=deepest+sleep+game+wiki`. This URL is embedded within the document's text, suggesting a social engineering lure. The presence of a PDF link farm heuristic further indicates malicious intent to distribute links. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=deepest+sleep+game+wiki
    • http://files.tartineneworleans.com/uploads/1/3/1/6/131607363/xolop.pdf
    • https://b4751132-87b1-40e1-9a6d-b5947cdb0f09.filesusr.com/ugd/565485_b67613031f3f44f584f46138acf99aed.pdf?index=true
    • https://f4e09a62-2c18-4152-9b13-054e6e768703.filesusr.com/ugd/668a47_c8d60a0d12014702bffc7bae6b4d2433.pdf?index=true
    • https://921ecbc6-d8f5-4152-9010-46339f11d6f5.filesusr.com/ugd/d61b30_34fd3dd165124020a1cbea4a88698553.pdf?index=true
    • https://b781c27c-0ed3-4638-b07a-961fa302e0d8.filesusr.com/ugd/23924c_44db2f81d085489e9c41c36c75b725ce.pdf?index=true
    • https://eed08b0e-8504-41bd-a494-8264fefd432f.filesusr.com/ugd/696117_b27972ad0ec749ce8c293db875da1b0d.pdf?index=true
    • https://4511684a-8f1e-4446-a516-8383f468daeb.filesusr.com/ugd/a4c1fa_8ed4326afd9d470a900e2861b6690d03.pdf?index=true
    • https://09d75f01-0f6d-4680-b900-721b545469e4.filesusr.com/ugd/b13fd1_24e9848dd44e479982994fffd1b24867.pdf?index=true
    • https://8632f7be-3930-4014-8b7b-22db7195ad4c.filesusr.com/ugd/1ee69b_3561e612510c4dafb56b5739420adbe8.pdf?index=true
    • https://604a16a2-5670-4e7b-9b94-ca3dac3fce2c.filesusr.com/ugd/9219f8_01ab1dcdf9d2493e8536634bf00ee0ad.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0439/0718/6843/files/jikaromefejorijefolona.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/norwich_evening_sun_obituaries.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/fesije.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/podamunajidirokewogexu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a205.bin
b438f5e2968de156433eb6e1d303f131b114a9e50bfdcd13aaa7d71ef36858ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA205 4772 bytes
font_01_sfnt_off0000b25b.bin
0d5a3cdb63f98abbf25476a447efe3d618fd7a3ec22555f7b8edc76ee75b2a7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB25B 10288 bytes
font_02_sfnt_off0000d59a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD59A 4324 bytes

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