Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6bb11a39a0b5b4b…

MALICIOUS

PDF

46.0 KB Created: 2020-08-14 12:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1c90a44f3b2c9d6e074586e147a0fcc SHA-1: c65f9fe80160ce4d04a799d1e992e2ed8a1fbe95 SHA-256: d6bb11a39a0b5b4b6ee1f8c0bac0831f9b009c9c45bf37705086a95a3020c7f1
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is used to lure users with a free presentation template. The document body also contains this URL and references to Shopify PDFs, suggesting a link farm or content distribution strategy. The ML classifier strongly indicates 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/pify?keyword=free+timeline+presentation+template
    • http://tagefu.nobordersmun.com/uploads/1/3/1/0/131070161/1275045.pdf
    • http://files.bannisterrunning.com/uploads/1/3/0/8/130874026/7915608.pdf
    • http://files.willhumegames.co.uk/uploads/1/3/1/6/131607063/3329941.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/78587072957.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/viritod.pdf
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/78543373029.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/arrhythmia_mechanism.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/the_cardiac_catheterization_handbook_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/legagolad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/zibubemuwubene.pdf
    • https://cdn.shopify.com/s/files/1/0447/8540/2013/files/self_declaration_in_prescribed_format_refer_annexure_e1_hssc.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/49940898350.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/43032835601.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/87689447818.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_off0000775e.bin
63543b379200a5ad3baa7f86e79ce2b6d8b1f174b59f4eba81175e0674eb7385
pdf-font-stream PDF embedded font (sfnt) at offset 0x775E 4920 bytes
font_01_sfnt_off000087f8.bin
c76c9ba90e7d491ae03ecf9fe3e803b0ae0f8be4d26efdbfd07a24879d77ca2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x87F8 10152 bytes