Malicious PDF — malware analysis report

Static analysis result for SHA-256 005da27deff04fbc…

MALICIOUS

PDF

42.2 KB Created: 2020-08-04 13:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 035f4734d08447fc9015a3a162261e2a SHA-1: 90e1335e259b5a06a25a405cba824ce4bca7d7e6 SHA-256: 005da27deff04fbceb19683e14e3428cdb3b36792f82685f870fd7535bfa1510
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains this URL and numerous other links to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=armonicos+en+la+red+electrica+pdf
    • http://files.capitalsitedevelopment.net/uploads/1/3/1/1/131164317/2043553.pdf
    • http://files.kingsvilleroofingcompany.com/uploads/1/3/0/7/130776511/95571f40a9a8.pdf
    • http://files.indconstructionforum.com/uploads/1/3/1/6/131636891/9875321.pdf
    • http://doxud.rivercliffestates.com/uploads/1/3/0/7/130776757/zesonuve_zalexob.pdf
    • http://files.texaspoweragents.com/uploads/1/3/1/0/131069899/ralemulasuvobalosij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/vakabogu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/sobipawok.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/89002581555.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0738/files/ffmpeg_command_line_options.pdf
    • https://cdn.shopify.com/s/files/1/0433/4023/4902/files/40610158950.pdf
    • https://cdn.shopify.com/s/files/1/0436/1800/9251/files/74924764504.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/5429853826.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/reridigasajosiwedebe.pdf
    • https://cdn.shopify.com/s/files/1/0437/5340/6618/files/18871702482.pdf
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/vesexidigutabugawidifema.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_off0000684b.bin
6154d3dee05525d375c070f48167cb73ac8e5b209f25ef751c9221175bd36dd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x684B 5288 bytes
font_01_sfnt_off00007a30.bin
497336c31b79d6c944582707341cc72cf66a65b6adb316da87a2baeef82460b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A30 9976 bytes