Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f165e2480a527d7…

MALICIOUS

PDF

44.8 KB Created: 2020-08-30 05:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9acd80b2a5fa49de0a6e033d5155e0fd SHA-1: ab205d04ae0ae0b58821b4f3e97e5c04664851be SHA-256: 3f165e2480a527d74309eb5da0215f0411814ba3261a1110c3ca87055aff49a2
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector (ttraff.com). The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this, and 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a potential SEO spam or phishing campaign. The ML classifier also strongly flagged this PDF as malicious. The embedded links likely serve as the primary attack vector, aiming to lure users to malicious sites.

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.com/wix?keyword=maniobra+brandt+andrews
    • https://static.usrfiles.com/ugd/b8c837_eaec37f21ff64c6ca47c91c912292bbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_39a7e07516dd45019b2af0ae4b07613c.pdf
    • https://static.usrfiles.com/ugd/b8c837_dcbf76e004f04d588fa84e7b9b39f13b.pdf
    • https://cdn.shopify.com/s/files/1/0439/2737/1931/files/rinaketofoselolomixobere.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/13643047491.pdf
    • https://static.usrfiles.com/ugd/9dda13_1403dc0677ad42d98bd853ef1bdd5b5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c45879901e34e7a9171cf37e6f36f16.pdf
    • https://static.usrfiles.com/ugd/b8c837_eab1f5ba57d3473eb3ce059b61ccb77c.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdba102466e944d28201341681839255.pdf
    • https://static.usrfiles.com/ugd/912de2_e43617c5be04461d917a832f49ddbaac.pdf
    • https://static.usrfiles.com/ugd/06497e_1ce55fa63fda494cb3b818bd729f6750.pdf
    • https://static.usrfiles.com/ugd/451461_2eecb87b88ee475ea4b762b0eee93ea6.pdf
    • https://static.usrfiles.com/ugd/b8c837_d39ec767d9fd401c96806e6af0641ef4.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_off00007285.bin
1fb36531c294dde740c96be0f4e5ae3da42b5f06be1003752e4fd890053dcece		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7285 5024 bytes
font_01_sfnt_off000083b4.bin
b9655a6399aad44c321008eb41cbbd2a8f19af9b15cfe1079e57613534f5b7d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B4 10072 bytes

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