Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b409292598a8d3…

MALICIOUS

PDF

39.9 KB Created: 2020-08-27 14:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76bc1c500cf13ef232383c7a0d9bab60 SHA-1: 56485d0588bcc084da982c737e131ad1db792e37 SHA-256: 19b409292598a8d3ad34471edda16e2ccb7779369b27f25f83b84b4b40a509f0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic firings indicate this PDF is part of a link farm designed to distribute malicious content, and the presence of a password-protected archive lure suggests an attempt to bypass security scanning. The primary attack pattern involves directing users to malicious infrastructure via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=mapa+de+actores+pdf
    • http://files.scottyjracing.com/uploads/1/3/0/7/130740553/5429424.pdf
    • http://xudabe.expressfullhealthpotential.com/uploads/1/3/1/0/131070006/779f8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/6777/2821/files/lng_bunkering_market.pdf
    • https://cdn.shopify.com/s/files/1/0428/8331/7926/files/17826461247.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1126/files/pukonirekibusir.pdf
    • https://cdn.shopify.com/s/files/1/0437/3718/6458/files/beginner_s_guide_to_sculpting_characters_in_clay.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6929/files/xofofeteturoxowa.pdf
    • https://cdn.shopify.com/s/files/1/0450/3640/4900/files/86583960022.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5805/files/rotodekom.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/35719256784.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7866/files/vewigoji.pdf
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/mockingjay_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/20471596695.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e14.bin
d64b858e25bce218a20eb57ab93a2ae57a5124676a20a9b0a01a267e0df84476
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E14 5120 bytes
font_01_sfnt_off00006f8e.bin
901879a226cc32575c59348f1bed511a9b8633ef8d5094c03603f5cfa032b46d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8E 10680 bytes