Malicious PDF — malware analysis report

Static analysis result for SHA-256 65859af93dcfe806…

MALICIOUS

PDF

67.3 KB Created: 2020-09-17 02:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd712771d1d567f0892c826b1ee6b802 SHA-1: fa0979fa7442792e90a926aa166a970510509d4d SHA-256: 65859af93dcfe80687c6a8354c530d54b754dfe8b54918543b55c774aabef481
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link-farming or content distribution scheme. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent, likely related to distributing further malicious content or SEO manipulation.

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=swtor+mercenary+arsenal+or+innovative+ordnance+6.0
    • http://pedipeva.christaresources.com/uploads/1/3/1/0/131070357/2253134.pdf
    • http://files.hairofthedog.shop/uploads/1/3/1/6/131636689/vafeneweb_kokinunefu_labunijagadejof.pdf
    • http://files.heathermclaurinart.com/uploads/1/3/1/3/131384098/9238a4d1c.pdf
    • http://files.travelagencyiowafalls.com/uploads/1/3/2/6/132681690/xovoba.pdf
    • http://files.pipsqatar.com/uploads/1/3/1/4/131452838/wipafejadakite_fowedubunu_limuridap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5de0994e-f195-439b-8085-8b09c38e6e18.filesusr.com/ugd/501a20_5613535a46f84316983438d60e77b564.pdf?index=true
    • https://eb75c662-e225-49cf-a366-9bc534988daa.filesusr.com/ugd/c88839_a1eb94d392364cb19663be39347b11ad.pdf?index=true
    • https://43566bc1-cad5-4514-b46e-ede485a15ff6.filesusr.com/ugd/f967ac_86dfbd813eda4056976cade722d6def5.pdf?index=true
    • https://c7649d9d-1095-4d0b-820b-e76d3a02362a.filesusr.com/ugd/a91264_99718c8adc6f4569ac75d32cea69af54.pdf?index=true
    • https://7c342cd4-6cf8-4f8a-9cb1-ad586158b6d9.filesusr.com/ugd/3ed44c_3cca7d808599462aa1b0f67f9088d5dd.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/vorazilovinag.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7980/files/notiwozanizu.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_off0000c74f.bin
1203b8e92eef5efdfbcd7ec7a282fbc4c298e3185d8b8a2ad1ff37dfe062bfee
pdf-font-stream PDF embedded font (sfnt) at offset 0xC74F 5768 bytes
font_01_sfnt_off0000daf9.bin
f5701c775649e28677b9893c28198f367b3a5e9a9ad348b8db44d8a88e622031
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF9 10836 bytes