Malicious PDF — malware analysis report

Static analysis result for SHA-256 13254526007038d7…

MALICIOUS

PDF

40.9 KB Created: 2020-09-16 14:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 039b689c9c6936fe6cf936acd504889d SHA-1: acf4561424c4aec4f910d2f287079babbe26584f SHA-256: 13254526007038d76a29c4e97577f34cfbe3c633d36b6111a76b7596f324b9b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure. The presence of numerous external links, many pointing to Shopify domains, suggests a link farm designed to obscure the ultimate 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.com/wix?keyword=kirby+air+ride+city+trial+checklist
    • http://dakowuge.wildfeatherfamilyfarm.com/uploads/1/3/0/7/130739017/69a4694cf627fda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/87143678789.pdf
    • https://cdn.shopify.com/s/files/1/0437/0412/3557/files/lifudutuk.pdf
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/classifying_angles_kuta_software_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/59909489441.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/79138520431.pdf
    • https://fb8e10f4-1354-4b64-84c4-40b0c32f6d07.filesusr.com/ugd/eb6612_45a9524f9f8d462cb7e1e5b77ac47ef0.pdf?index=true
    • https://5c79c7e4-a539-4b51-bb21-b67b91ee773c.filesusr.com/ugd/b463f2_ede72a790a7c4692b36579b426dac976.pdf?index=true
    • https://e420843c-8515-4cc4-80a9-8ed1b1ff989a.filesusr.com/ugd/dcc11b_0973720a97044c98b892c00aff12fbf3.pdf?index=true
    • https://b9c03409-4293-4929-8509-3c006d319c5f.filesusr.com/ugd/ced2dc_639e2347d6a34c5cb14a5252967a550c.pdf?index=true
    • https://3d1a92a9-3bb1-4326-9dd6-79a1e845264b.filesusr.com/ugd/5bb01c_4214db3df3aa4b92958d948d230aff9c.pdf?index=true
    • https://713e02f1-8b89-46e7-82ac-d8a141405aea.filesusr.com/ugd/e948c1_153f425d41c34e0a9d32be8cd03e6801.pdf?index=true
    • https://4af0a01b-7cbc-4e2e-856e-cbe8ecd02381.filesusr.com/ugd/18f527_3d02f6ef78ae46ad9000f6d857408126.pdf?index=true
    • 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_off000061b6.bin
6f017162e309b3b139e73469131905444c619821082d50c5b31b57d6b58e2efa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B6 5304 bytes
font_01_sfnt_off000073b3.bin
3a727c4ee0583b9e20cfdf2dca9661a7399c7656dc7753322111bfb9053c7c48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B3 10236 bytes

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