Malicious PDF — malware analysis report

Static analysis result for SHA-256 8288dcc8d9c274b4…

MALICIOUS

PDF

44.4 KB Created: 2020-08-19 14:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8e6d58aea06d6bb9410538885e79be2 SHA-1: e96e2dfa65350e17dbfb08924c0da3642bab6f73 SHA-256: 8288dcc8d9c274b43cb21ae8a2714d74957950d9cc45800e96d87d7ac612cdf9
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Shopify domains, forming a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is disguised as a 'head chef job description template'. This suggests the document is designed to lure users into clicking malicious links, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=head+chef+job+description+template
    • http://files.alanandanooshbullock.com/uploads/1/3/0/7/130738933/wobojemofe.pdf
    • http://gixupob.kristenwu.com/uploads/1/3/1/3/131383652/togevupubebod.pdf
    • http://files.personalhibachichef.com/uploads/1/3/0/7/130775518/ef47c65ebfc36f1.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1254/files/retobewobexamebojivutot.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/19205461063.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/fudepedanekev.pdf
    • https://cdn.shopify.com/s/files/1/0438/1625/5650/files/lakivibumoparawul.pdf
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/faxelitivivoze.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/99640523525.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/jidimasugilad.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/elementary_statistics_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/677001865.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/1493563034.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/84932779678.pdf
    • https://cdn.shopify.com/s/files/1/0437/2781/4810/files/gartner_ai_report_2019.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_off00006f1e.bin
81acb1c5d449668cbf6fd2409bfa067835bcba37f2d8a770e194e87e4a8eb05d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1E 5572 bytes
font_01_sfnt_off000081dc.bin
545c9010f4d1de64f4910d22e514e53ad93cf8af8191c2b3a15ccd33f1dd36ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81DC 10220 bytes

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