Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d31d73eaed6444…

MALICIOUS

PDF

34.4 KB Created: 2020-08-05 09:21:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f131e2369a6924cd7671f993cc54ef6b SHA-1: f1564b49d713441d473c999e3a6476e0bf2e6cde SHA-256: e0d31d73eaed6444b62f381c18718af568ca01fd803916023c33046f7c0b1113
152 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.cc'. This link is presented within the document body, disguised as a download for a book. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains, likely for SEO manipulation. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is a malicious lure.

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=history+of+english+literature+by+mundra+pdf+download
    • http://nonikuw.callanassociates.com/uploads/1/3/1/3/131381428/mabefobikamo.pdf
    • http://files.lama-lab.com/uploads/1/3/1/4/131483148/totegenuruziba-nijugufe-mokitedowofali-raxakaj.pdf
    • http://files.flsteppersint.com/uploads/1/3/1/8/131871699/bogikutaxusala_guxamigopujuki.pdf
    • http://files.forwardsolutionsmalta.com/uploads/1/3/1/1/131164231/navamofole_napakotugo_pedebar.pdf
    • http://files.knowbiblefactsfromfiction.com/uploads/1/3/2/6/132683000/6398489.pdf
    • https://cdn.shopify.com/s/files/1/0432/1922/2687/files/65249730605.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/pavasobokamegovadovejiros.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/25840838564.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89120683065.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/18641677850.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/zufabenuxabemu.pdf
    • https://cdn.shopify.com/s/files/1/0436/8682/2053/files/xixulixi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2894/5815/files/renotezogupev.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9558/files/jarenok.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/11297035150.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_off0000467f.bin
ceb6919818516544727f67133e3d09abb7e48b63ae39c2f8f53a1345709267c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x467F 5748 bytes
font_01_sfnt_off000059f3.bin
d477a8653ef41663b3a78a0fc8761f3d60f15712c1b41398a38c2fd06d32a7fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x59F3 10100 bytes