Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aec71b0ca2efb57…

MALICIOUS

PDF

36.8 KB Created: 2020-08-13 04:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7c046d12c6b4a5243230e3a32d7ea21 SHA-1: bd412b729fe9d75f2290f28eb514c9d0ad137adf SHA-256: 7aec71b0ca2efb5752c2663648a200a6413cbee217780882f4cc9d9deadda6b5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body, though heavily obfuscated, contains the same URL as the primary redirector. The presence of a link farm and a malicious redirector strongly suggests an attempt to drive traffic to malicious sites, likely for phishing or malware distribution.

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=le+bourgeois+gentilhomme+texte+int%25C3%25A9gral+pdf
    • http://files.shindenkarate.com/uploads/1/3/2/7/132741241/vasexuzixojave.pdf
    • http://soginase.head-to-toe-ministries.com/uploads/1/3/1/3/131383837/5483185.pdf
    • http://files.gourmetgarlicgardens.com/uploads/1/3/1/1/131164531/kitapi.pdf
    • http://files.flightinstructorpro.com/uploads/1/3/0/8/130813550/3019320.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/22114827178.pdf
    • https://cdn.shopify.com/s/files/1/0429/6228/8793/files/77423984786.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/98874291303.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/gukipupudotibete.pdf
    • https://cdn.shopify.com/s/files/1/0441/2823/9768/files/libro_el_bardo_thodol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74808095599.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/buzzed_card_game.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/62409240816.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7525/files/noruvomazimakug.pdf
    • https://cdn.shopify.com/s/files/1/0432/4327/4395/files/zijevotogobalijet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/jovotaxigefum.pdf
    • https://cdn.shopify.com/s/files/1/0429/5006/6339/files/tosuto.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_off00004ca8.bin
ab066ad4fffb610abb93f5f89b5e55b98a7749c8ae882539b1bcb7e09155d650
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA8 5744 bytes
font_01_sfnt_off00005fc3.bin
1fe2f6272ab306b35bdce5d75e4d753350e20c34ec3c7a4356efd62624b5f7f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC3 11324 bytes