Malicious PDF — malware analysis report

Static analysis result for SHA-256 5701214422f89dd5…

MALICIOUS

PDF

61.7 KB Created: 2020-08-19 17:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27ad4230d7c9dc3162c1335386939408 SHA-1: bc72d78794a44429400f7449c74491649d6ff001 SHA-256: 5701214422f89dd57b8703a23a8a641702e2ee38d5687a3b0b152df60df61109
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is used in a lure for a free credit report review. The document also contains a mass external PDF link farm, with the primary domain being 'cdn.shopify.com'. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.cc/pify?keyword=experian+free+credit+report+review
    • http://files.nickysawesomewebsite.com/uploads/1/3/1/0/131071041/temevapupenapek.pdf
    • http://files.sweetavenuephotographyblog.com/uploads/1/3/1/8/131856112/5936769.pdf
    • http://files.templetonauctioneer.com/uploads/1/3/0/8/130813747/kukadanon.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/tisuwuvuvilezijodowiwapaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0769/7305/files/54439329994.pdf
    • https://cdn.shopify.com/s/files/1/0429/6245/2643/files/ontologia_significado.pdf
    • https://cdn.shopify.com/s/files/1/0431/9939/8052/files/75939962552.pdf
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/30088193865.pdf
    • https://cdn.shopify.com/s/files/1/0430/6622/8898/files/c._g_comedy.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/adobe_premiere_pro_cc_2020_classroom_in_a_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7530/4612/files/pregnancy_back_pain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0435/5319/4133/files/46942956009.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_off0000a48b.bin
8b00ff4f715b1b8518cf042974173613a67ba1687d0a52be582bbb1466231288
pdf-font-stream PDF embedded font (sfnt) at offset 0xA48B 4904 bytes
font_01_sfnt_off0000b551.bin
e5ca3bd72142d6e825931c81b1d9ec03e2b8f15aebdd89e70df8ae9d4bc6388b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB551 11248 bytes
font_02_sfnt_off0000dbb5.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB5 4324 bytes