Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2ee8c8bf673484…

MALICIOUS

PDF

47.7 KB Created: 2020-08-30 17:27:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 348d04cb58ae7a7d135768caa1146eba SHA-1: edaafbb74c1f0ce779d252fc1890a91fb97794bb SHA-256: bc2ee8c8bf673484a9442f2bade2847791b4e315675657829214b310c65ca82e
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs the user to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure for adult 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.cc/wix?keyword=zadarmo+ne%25C4%258Dlena+porno
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/mozomiretax.pdf
    • https://cdn.shopify.com/s/files/1/0429/9515/5105/files/64456319290.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/airmen_x_group_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0427/9743/2999/files/34612125868.pdf
    • https://cdn.shopify.com/s/files/1/0450/4797/1990/files/nefepegix.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4423/files/cabaret_club_grand_prix_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/metagidemufo.pdf
    • https://cdn.shopify.com/s/files/1/0441/2188/2776/files/95157452403.pdf
    • https://cdn.shopify.com/s/files/1/0460/2514/6527/files/bsa_horsemanship_merit_badge_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/9028/7517/files/10902579055.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49605194079.pdf
    • https://cdn.shopify.com/s/files/1/0462/5652/1367/files/zodoxumiwevani.pdf
    • https://static.usrfiles.com/ugd/04e6f9_bff64890d7974637bc0129bcbb5f8499.pdf
    • https://static.usrfiles.com/ugd/b8c837_237568de05904230a47c5cca5fd92d27.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a6e6c3af0e04fbc8a3a456fb6f199ea.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_off00006c4f.bin
33b6786727aa3405a0c994eb8947fa87554bee93b851f42019c19a7c5f6bf6e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4F 4688 bytes
font_01_sfnt_off00007c17.bin
09b1ff14a3bd1a0a40fdaa834de23bce5aaf03b924887c21e3a9845ffa5008f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C17 12192 bytes
font_02_sfnt_off0000a1d5.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D5 4324 bytes