Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e359abbf12b127a…

MALICIOUS

PDF

39.3 KB Created: 2020-08-14 22:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3f86aad4cdd4ecbe619285de8b78034 SHA-1: 512150834768d70c24c53b7d9404ad3f55d259f6 SHA-256: 9e359abbf12b127acba5d5a963425beeccf671566007947f79cd7eaaba6398e9
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wb?keyword=mcafee%20drive%20encryption%20manual%20uninstall'. The document body, though heavily obfuscated, contains similar text, suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy. No scripts were extracted from this sample.

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/wb?keyword=mcafee%20drive%20encryption%20manual%20uninstall
    • http://kilus.honeycutthausshepherds.com/uploads/1/3/0/9/130969204/3030573.pdf
    • http://files.knowbiblefactsfromfiction.com/uploads/1/3/1/3/131381374/dinejipe_gesufudopiziri.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/naledibomuposaridor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/73949988396.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/bocio_multinodular_difuso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/65924326097.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/90351292781.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/dejozajikebadagupadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/80839951004.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/aislantes_electricos_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2321/files/vesipoxoretapimumikidape.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48465164240.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_off00005af0.bin
3e405dcb75e7ebca2a3f9e5464283fafcd69af4011d695af6c9db74bcb54fe9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF0 5468 bytes
font_01_sfnt_off00006d7f.bin
5432ea5c166d48b9826c1dccf11392c2e7ad0b7a2595a50f9f79889ee9e61fdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7F 10196 bytes