Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c7d49faa97a279d…

MALICIOUS

PDF

45.2 KB Created: 2020-08-30 02:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 110908a292472152a40d824037e110e2 SHA-1: 939cad4e93a535480a008c02ba62ade000707f32 SHA-256: 8c7d49faa97a279d6f015aa8c45339b301c397e7c92426b9c05cf0302363dcba
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.com'. This suggests a phishing or scam attempt where the user is lured to a malicious site. The ML classifier strongly supports the malicious verdict.

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/wix?keyword=banco+de+blevins
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/36033397944.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/84001596420.pdf
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/pagixexixobobiva.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/gozorilajozupuwomijaxid.pdf
    • https://cdn.shopify.com/s/files/1/0435/8393/0527/files/forensic_anthropology_and_medicine.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/wopamidazolizo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5689/6927/files/95380256699.pdf
    • https://cdn.shopify.com/s/files/1/0430/0380/5847/files/64586114289.pdf
    • https://static.usrfiles.com/ugd/0dd040_2277cc0836f1498d94a1d6e90393ded3.pdf
    • https://static.usrfiles.com/ugd/6f7357_011eefc82d8b4be2b4e661c6f6fac8bd.pdf
    • https://static.usrfiles.com/ugd/6d59ab_6b2e0230c6c4424a80b45c4cafc59162.pdf
    • https://static.usrfiles.com/ugd/cac9e4_e55d12452fe045c79aed6b81a91bac78.pdf
    • https://static.usrfiles.com/ugd/c83fdb_dbd5bc1bf50d4671a72ccd25e02ff91b.pdf
    • https://static.usrfiles.com/ugd/41a0b6_6c48d4817eeb414596b160d5bda18768.pdf
    • https://static.usrfiles.com/ugd/b8c837_a21b72bb2cfa43b981a0160bcc6d9be2.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_off000071ba.bin
6a5beec0f043d8e9abc54e6a100aa55938fc4c47cea9ce064a888bd3d3679e94
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BA 5084 bytes
font_01_sfnt_off00008314.bin
bfa36b0b253819c0ea37de69490af379eb24ca6a74619ef79653b8f720716442
pdf-font-stream PDF embedded font (sfnt) at offset 0x8314 10748 bytes