Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f92cd9c108fb94…

MALICIOUS

PDF

40.8 KB Created: 2020-08-25 03:06:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 393952b7690463f5727d1a63f411963f SHA-1: 236312e24b64a7e4aea174c90cefa8c2a5f3267c SHA-256: f2f92cd9c108fb94087e65abfcb18cae5e9f0fd40075d608a9356c807549e2a2
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary link directs to 'ttraff.cc', a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to external content. The presence of numerous links to shopify.com, while some are benign, indicates a link farm strategy to potentially mask malicious destinations.

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=jeopardy+educational+games+in+powerpoint+templates
    • http://files.essouglydispute.com/uploads/1/3/0/7/130739712/9214b5b.pdf
    • http://files.hcfcorp.org/uploads/1/3/1/3/131398215/c3bfb51a.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/dosokimumibisen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/28780638047.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/bodogiwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4087/files/55515564119.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/66769899684.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/3242437891.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/37893754182.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nawujumukupuzuwoxelojoses.pdf
    • https://cdn.shopify.com/s/files/1/0435/3064/9749/files/flower_horn_fish_care_guide.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_off0000601d.bin
20f4df98713e31e4f2198c9dd5f7ad30fb3d24189e2cc4f99864f17ea1aeaeef
pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 5576 bytes
font_01_sfnt_off00007310.bin
0ab6a6fdfc18190ecb5c4433054a319ecf19af5b5d20a9abed72f7dc74d41c21
pdf-font-stream PDF embedded font (sfnt) at offset 0x7310 10404 bytes