Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f1facd59d47416…

MALICIOUS

PDF

39.7 KB Created: 2020-08-18 23:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cc4948d97936df8d7f1f184b73e058f SHA-1: e808f499c36d1841574974c82329c7613b602469 SHA-256: 92f1facd59d47416034355ef13fa992c1685abcf334ac1704fdbee0859c6be4e
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=aluminium+sheet+roofing+systems', points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Aluminium sheet roofing systems' and includes the malicious URL, suggesting a lure. The presence of numerous other links to Shopify-hosted PDFs indicates a link farm strategy, likely to improve SEO for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=aluminium+sheet+roofing+systems
    • http://zekeg.raamarchant.com/uploads/1/3/2/6/132695550/filaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3079/files/burger_king_nz_menu_prices.pdf
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/90804462890.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8535/files/bike_ride_status.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8397/files/mogufanipomududimotapu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/93963542412.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/93318053839.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4139/files/68184352966.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/lista_de_alimentos_con_fibra_soluble.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/cateterismo_cardiaco_en_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0430/3470/6069/files/ap_biology_chapter_55_reading_guide_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/68477017249.pdf
    • https://cdn.shopify.com/s/files/1/0440/6686/5302/files/38392526495.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_off00005d8a.bin
9fc81773243c39115540b2621664fa40cb125f4293152d7da49bf1ffc0b92ba0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8A 5064 bytes
font_01_sfnt_off00006e9d.bin
3ef3ef6fdd4ea564e2ba10db080ebb5157a72036bd6c4d2b5624d958be38ec0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9D 10392 bytes