Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb054d9906466e1e…

MALICIOUS

PDF

39.4 KB Created: 2020-08-30 06:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9eba9c4875a9494483c7319c59d75664 SHA-1: 112b1c0a15030b250fff723f23ba38a578ea35b2 SHA-256: fb054d9906466e1e5030eacf814d9ba3ef76f8fe932437608f3a964d8e0b6a33
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one specifically identified as a malicious redirector. The document body, though partially garbled, includes the text 'Doorking 1812 manual' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The heuristic firings confirm the presence of a malicious redirector and a link farm, indicating a coordinated effort to distribute malicious content.

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.me/wix?keyword=doorking+1812+manual
    • https://cdn.shopify.com/s/files/1/0462/8637/3025/files/rokipunivobixuxodebemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/85082039695.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/51553234000.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0030/files/mathematical_induction_proof.pdf
    • https://static.usrfiles.com/ugd/73c254_57490338276e468db35ff38a39a0520b.pdf
    • https://static.usrfiles.com/ugd/b8c837_1035d7638ebd4db7a7bd4b6e53a0d5f9.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_94b95a3e330746fdbad348da76371165.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/mutekovixusixuked.pdf
    • https://cdn.shopify.com/s/files/1/0437/6425/2821/files/xenusorek.pdf
    • https://cdn.shopify.com/s/files/1/0447/9637/9285/files/37049043113.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_off000052bf.bin
26a2e915da5d959df759db824511cc6240c1dec637aa734339253164058ce5f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BF 5268 bytes
font_01_sfnt_off0000649a.bin
05b038e8d4c66de4a4315b073a10806a78096462aaa638c96ccc8644c2c6663d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649A 14432 bytes

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