Malicious PDF — malware analysis report

Static analysis result for SHA-256 f340a4c51796f962…

MALICIOUS

PDF

33.3 KB Created: 2020-08-16 15:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de6d06edce1ce4f880076c49f76b7d85 SHA-1: fb09b7ee709f402695daef874534abca451c8ba7 SHA-256: f340a4c51796f9629db93da5f01260e386694d5fda06ce4e2fa87a90c84aafe3
152 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a mass external PDF link farm, with many links pointing to shopify.com domains, suggesting an attempt at SEO manipulation or a large-scale distribution of links. The document body contains the phrase 'Baccho ki photo karni hai' and references wkhtmltopdf, indicating it was likely generated programmatically to host these links.

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/pify?keyword=baccho+ki+photo++karni+hai
    • http://files.barnesscience.com/uploads/1/3/0/7/130738794/38a54d5558ac7f5.pdf
    • http://nolila.vickijansma.com/uploads/1/3/1/1/131164250/1322508.pdf
    • http://files.banditaerialproductions.net/uploads/1/3/0/8/130813301/zikezituzotaju_pesudavevagusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3743/files/guru_gossip_clothesencounters.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/50831692282.pdf
    • https://cdn.shopify.com/s/files/1/0432/3901/4562/files/melevotelivomudez.pdf
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/tefiliwivabapewetiza.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/266838935.pdf
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/29767362708.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/luwevazozowajijawunuromu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6711/files/bonasod.pdf
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/95040791549.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/rasavanizusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0242/9593/files/18175609798.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/7017688207.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_off000046be.bin
b557eb7d9246bf2bec313e535bf66b514ec264682ea9ee17f5a525d1330bc343
pdf-font-stream PDF embedded font (sfnt) at offset 0x46BE 4924 bytes
font_01_sfnt_off0000576c.bin
a106b362a117b61d2ed248d2b20936b6ce09eb59cbf021f866256b7a01220a59
pdf-font-stream PDF embedded font (sfnt) at offset 0x576C 9644 bytes