Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b03a4779bbc0f5…

MALICIOUS

PDF

50.1 KB Created: 2020-08-19 10:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae9d99dfd22b1b298dfdebac9c8b3d54 SHA-1: 2059d725bc244d79a465738b63040d9b0068fca7 SHA-256: d0b03a4779bbc0f5f15a42fe6e3f292486484f558d593ea9d728b3150c80b8e3
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=vlookup+different+sheet%2523+n%252F+a', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended destination or part of the redirection chain.

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.ru/pify?keyword=vlookup+different+sheet%2523+n%252F+a
    • http://minemugez.tanimaherphotographs.com/uploads/1/3/1/6/131606968/19eaf6bc9e.pdf
    • http://tasivalud.twostallionsthailand.com/uploads/1/3/0/9/130969959/e7538.pdf
    • https://cdn.shopify.com/s/files/1/0428/8223/6572/files/tizuxubikobupulabefe.pdf
    • https://cdn.shopify.com/s/files/1/0435/4618/1787/files/17673500658.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0440/3786/5637/files/zuzov.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4041/files/23409249060.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/12775915734.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8075/files/pizepibumusizuwesisosinug.pdf
    • https://cdn.shopify.com/s/files/1/0434/2739/7797/files/bass_guitar_neck_notes.pdf
    • https://cdn.shopify.com/s/files/1/0448/7122/1410/files/circuit_switching_and_packet_switching.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/wuromoroxefefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/anyconnect_ordering_guide_2018.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_off0000835b.bin
ef080cddba5e2bf0f348663028de01789287b44e7a0ebf0805a13f7e03041e0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835B 4948 bytes
font_01_sfnt_off00009433.bin
f257ad29fda8c77297e030dc5fa074e75c2f0780596eddf6746ae7dcf5178b60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9433 11844 bytes

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