Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d6a23e6d8cb094…

MALICIOUS

PDF

44.4 KB Created: 2020-08-06 01:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e43676cf1e661c1506a1171e84a20cf6 SHA-1: 1c5632c8e5b4ceaccfa8810854956d903f9e2ab5 SHA-256: 98d6a23e6d8cb0948627197759f66e15723bb7f4bd571511172f7a15530376c7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify but point to potentially malicious content. The ML classifier strongly indicates 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=credit+card+information+form+pdf
    • http://getodux.chernock.net/uploads/1/3/1/4/131406893/gudew-minowa.pdf
    • http://files.backroadshepherds.net/uploads/1/3/1/6/131637374/bavoj.pdf
    • http://files.softwavetherapies.com/uploads/1/3/1/6/131606133/kefugokelom-zerufuvamoful-rabudisunutu-litinusukise.pdf
    • http://files.hackja.com/uploads/1/3/1/8/131871864/jeniwatu.pdf
    • http://files.schwarzboots.com/uploads/1/3/2/6/132681336/rixivemo-vozema-bilupowotodor.pdf
    • https://cdn.shopify.com/s/files/1/0439/2180/1371/files/3600_ford_tractor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61403973964.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9076/files/68549557781.pdf
    • https://cdn.shopify.com/s/files/1/0429/6205/9427/files/structural_analysis_hibbeler.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/6494902981.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/pojufexewokasalidabejulam.pdf
    • https://cdn.shopify.com/s/files/1/0428/5513/7447/files/third_law_of_thermodynamics_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/personal_trainer_job_description_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8027/7406/files/najawisa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/42860358137.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f59.bin
5494284405cee61f4523c607c05c873abb74f8cbe11b649bd056555660f5cec5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F59 4996 bytes
font_01_sfnt_off00008042.bin
7cccf0ef83461d1cd4c22b139d446d48a5bcdc7bcbc566104fffa875869ad21c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8042 10732 bytes