PDF malware analysis — malicious · 504a6d7db80054fb

MALICIOUS

PDF

38.7 KB Created: 2020-08-29 22:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b82cc327624abaa87124e1514489d82d SHA-1: 01a73be382f19e46c755f904ed655cb932526fa7 SHA-256: 504a6d7db80054fb58414b2a0fe888289679b3df6ba973d8450e54bf0a4051c1

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document exhibits characteristics of a link farm, containing numerous links to external PDF files. One prominent link directs to 'ttraff.cc', a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The ML classifier also flagged this PDF with high confidence.

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/wix?keyword=learn+japanese+online+nhk
- https://cdn.shopify.com/s/files/1/0428/3141/3414/files/national_defense_authorization_act_2012.pdf
- https://cdn.shopify.com/s/files/1/0434/3064/1826/files/nofapobokex.pdf
- https://cdn.shopify.com/s/files/1/0428/5975/7734/files/nijedazavizop.pdf
- https://static.usrfiles.com/ugd/b8c837_dc9f5a679e1948a0bc660624708cd1f4.pdf
- https://static.usrfiles.com/ugd/b8c837_95bde3f0ece449be9e72462082bb8498.pdf
- https://static.usrfiles.com/ugd/b8c837_6b6aa1f6836a47dfb7b7df5241736d61.pdf
- https://static.usrfiles.com/ugd/b8c837_bdf838f6053b4991886d3a1a2d6d2eaf.pdf
- https://static.usrfiles.com/ugd/122077_e6993e3d8fef4f3596cd81847428b558.pdf
- https://static.usrfiles.com/ugd/1fbf8b_1c7188804cb94a2b86b94421c31da6b0.pdf
- https://static.usrfiles.com/ugd/b8c837_70fa9ad2f64145bc96ffa54f0b6d7146.pdf
- https://static.usrfiles.com/ugd/b8c837_c75bab433d8c4b67ad5ce6b245600aad.pdf
- https://static.usrfiles.com/ugd/b8c837_809b9ec0fffd4ff5808c94bcaab60713.pdf
- https://static.usrfiles.com/ugd/10e3af_37f559119c474511abe085bc9ed42238.pdf
- https://static.usrfiles.com/ugd/6c98bc_4bf81ace6ba7445390198374d84ccb01.pdf
- https://static.usrfiles.com/ugd/b8c837_570843dfa00848aa8f001642ff081495.pdf
- https://static.usrfiles.com/ugd/8cbfce_94fce2f9d190423db363e0d41c6b0f2e.pdf
- https://static.usrfiles.com/ugd/2c608b_675288c1ade545b3b53308a9b7488f4e.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00005b8d.bin` `98add7dcb40def2785eb3240c88ff05971265125e128c9a429efbb2cb03f0201`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B8D	4988 bytes
`font_01_sfnt_off00006c7d.bin` `42c497a9b2c3e4ea5d56261ee84fc43ceb1d919c1f2fac331279611cf580e5ac`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C7D	9744 bytes

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