Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ded6184dee344b0…

MALICIOUS

PDF

43.8 KB Created: 2020-08-04 14:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23435cc193fe88a9ba9c8f77021564ad SHA-1: 3278279739c22e290bc4ce0dc5761b2057beaeb5 SHA-256: 3ded6184dee344b07e5b4e9f9493a1996ad62eebd1ba4bbf00c33f752c9236d2
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a phishing or redirection attempt disguised as a workout PDF. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector is the primary indicator of compromise.

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=battle+ropes+workout+pdf
    • http://files.alltheragemusic.com/uploads/1/3/0/9/130969231/donegawaga_xiposemaxomiwaz_xusosadawe_bulugotew.pdf
    • http://files.nicolaspabion.com/uploads/1/3/0/7/130775505/40a1aa65b8.pdf
    • http://files.heartnhands.org/uploads/1/3/2/6/132681210/fotitobupomumiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/fejalibovu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/59754266173.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/rovoduguduwa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/rutovaxupolosotuvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4204/6103/files/95072815115.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/11112840282.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/daxuwapogajem.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7670/files/sea_star_dissection.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/75367640526.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/pumitetodesejizuto.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/74616917801.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_off00006c2d.bin
9aa021d88bc18cf16ca0701f08bbd0b16c566d60977f97677523e14f9fc136a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2D 5240 bytes
font_01_sfnt_off00007e22.bin
f66182f50333bb1fba8f3c693a6dd5139f9374278873d7ec300285af4fa990fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E22 10872 bytes