Malicious PDF — malware analysis report

Static analysis result for SHA-256 df3eba56505d90e3…

MALICIOUS

PDF

53.6 KB Created: 2020-08-31 00:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca4c370cc32afee1b657cea1c06d5a48 SHA-1: 79888593f5065a133a6114b174cdb93c2d0ff1d0 SHA-256: df3eba56505d90e38eefead7f7a93f1a99ee431ef56904facdf6d4190ea28410
152 Risk Score

Malware Insights

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

The PDF file was identified as malicious by an ML classifier and contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links directs to a known malicious redirector, ttraff.com, suggesting a phishing or malware distribution attempt. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact 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.com/wix?keyword=%25E1%25BB%2591ng+%25C4%2591%25E1%25BB%2593ng+sur+bois
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/spc_statistical_process_control_in_injection_molding_and_extrusion.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/15034207544.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/74100055504.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/4373908736.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/macro_perspective_of_tourism_and_hospitality_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0438/1310/9920/files/22874637836.pdf
    • https://cdn.shopify.com/s/files/1/0446/9247/1962/files/bapebujosizetalev.pdf
    • https://static.usrfiles.com/ugd/ce14f3_ef80bbed6952429d91e16a32555ba622.pdf
    • https://static.usrfiles.com/ugd/ef7b09_b96f10f77da24bbea7d9ffe5a0423c7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_cdb8c915d5d04509a775216ffb8b7c2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc521717ca6b4144b1c2522fc09c90ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_e83cb3f7aa5748c1ab91b8ec145a8655.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8db80fde86a496da0cd0628d5415365.pdf
    • https://static.usrfiles.com/ugd/b8c837_d6be4d119454488385e544be8e0be150.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006834.bin
8a9ca27ea8740d32df3ce7142475258ac24422b526eeb20302f50e4ec579c947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6834 13192 bytes
font_01_sfnt_off0000929a.bin
678255ad64cfe9aaae5fac8f5f5231cfa761c2072c60e17d9e1bd8354db8e6e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x929A 5152 bytes
font_02_sfnt_off0000a3f6.bin
7deb8597920da19ff588dbb2ed2fb23b4a47366bd6cb99b35f5b512edddc7d2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3F6 10692 bytes

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