Malicious PDF — malware analysis report

Static analysis result for SHA-256 c818e9b07931f7b1…

MALICIOUS

PDF

45.9 KB Created: 2020-08-30 10:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba39db6368ba48f97da3d56d28f739f1 SHA-1: 782279a49c5836609aa94d84f57b97f8751b0e16 SHA-256: c818e9b07931f7b1bd4a30cd02390120460a6ad6a1cad830495ab4b5214e4e98
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, pointing to a URL that is disguised as a bible study resource. The document body and embedded URLs reinforce this lure. The presence of numerous external PDF links suggests a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=war+room+bible+study+week+2
    • https://static.usrfiles.com/ugd/b8c837_bd8519c171fa453ab5508dc59ce0c169.pdf
    • https://static.usrfiles.com/ugd/b8c837_70fbf398f44e4ddc8027684bf0db4cc8.pdf
    • https://static.usrfiles.com/ugd/1d64af_14921272f2dc47a4ac4fb89387b4c5c5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f989ae8e67454aa888573520db37d1a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_595645a606b9452192fa9041e802d36b.pdf
    • https://static.usrfiles.com/ugd/52b593_afb0e89c1cad43f3bbb9c6f2456311db.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab692594220b4223b171ffd1f9ddee5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_da1b8b8407d442d7998881b1a0444216.pdf
    • https://cdn.shopify.com/s/files/1/0436/0758/9027/files/tulesadonej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/atharv_and_vividha_pics_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/23975647864.pdf
    • https://cdn.shopify.com/s/files/1/0454/6340/4694/files/87587725108.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/58324079272.pdf
    • https://cdn.shopify.com/s/files/1/0438/0943/9906/files/woxexo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/35556680957.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000673a.bin
f6851f304949c0db2fb15f27c402d90c25b11d9e988e6fcc0685e7c53c75d478		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673A 5288 bytes
font_01_sfnt_off00007950.bin
6d886ab92df8e181c76a668bcecf78c7cc2a1b82c769bbd308559af9f0bd16ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7950 10240 bytes
font_02_sfnt_off00009c57.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C57 4324 bytes

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