Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afe566ec9d46dc6…

MALICIOUS

PDF

45.3 KB Created: 2020-08-21 15:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 107ae3e36df98cbcb812623ee8379ad5 SHA-1: 3dde61778e72ed6cefd68719cacc328339353053 SHA-256: 6afe566ec9d46dc65cd0632770ecdd2fffbc7a73264c971351dd67d0a6276c02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with keywords related to 'St John Ambulans Malaysia uniform'. The document also functions as a link farm, pointing to numerous other PDF files hosted on Shopify and other domains, likely for SEO manipulation or to spread malicious content. The ML classifier strongly indicated 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.ru/pify?keyword=st+john+ambulans+malaysia+uniform
    • http://files.foristellchurchofchrist.com/uploads/1/3/2/6/132681144/zafonajugu_pefofuvowukuk_xozifa.pdf
    • http://bewuv.whatsanoptician.com/uploads/1/3/1/0/131070374/0464cc9613d5e.pdf
    • http://files.northwoodsbulldogs.com/uploads/1/3/2/6/132681409/moviwifemof-nutujebomuvapi-gisikuxuvewep.pdf
    • http://files.gracepeaceandtruth.com/uploads/1/3/2/8/132813998/pexed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/sugarcane_bagasse_properties.pdf
    • https://cdn.shopify.com/s/files/1/0429/8273/6031/files/bncc_do_ensino_fundamental_em.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/ashok_leyland_logo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/nobamifojawitapawatuto.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/athens_attractions_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2588/files/kovoluvawipun.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/16910965031.pdf
    • https://cdn.shopify.com/s/files/1/0435/6361/4369/files/87027231279.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000665e.bin
1e2279a02660c83e408e65550a5fbac8bbe629df79e18ec43613c3b16aec1209
pdf-font-stream PDF embedded font (sfnt) at offset 0x665E 5192 bytes
font_01_sfnt_off000077c9.bin
1fc0234c795084c6e50cd6826b085eeada387fef535c975cc7bc41ec26413eb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C9 10152 bytes
font_02_sfnt_off00009a83.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A83 4324 bytes