Malicious PDF — malware analysis report

Static analysis result for SHA-256 586a62dc90118a08…

MALICIOUS

PDF

41.3 KB Created: 2020-08-29 09:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c2723d9113c490fdb1100a16bd1d27 SHA-1: 3b2ad8277f50ea2132479c1a87a36293059b505e SHA-256: 586a62dc90118a081f6891144a80f576ebd8efae89bc517eaff60869821587c9
150 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a significant number of external links, many pointing to benign Shopify domains but one critical link to a known malicious redirector at 'ttraff.com'. This suggests the document's primary purpose is to act as a link farm, directing users to potentially harmful content or phishing sites. The presence of the 'flair smart vents' keyword in the malicious URL indicates a potential lure.

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=flair+smart+vents
    • https://static.usrfiles.com/ugd/b8c837_f161f0b7b51f4be3bef87c4ba7d94523.pdf
    • https://static.usrfiles.com/ugd/b8c837_bcd678c7ef524c07bc309c103da931d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_565e142e74bb4bff947d7d6f5e03d185.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rewosegukedisupagur.pdf
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/t_mobile_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/20292783235.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/51759879394.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/common_business_english_phrases.pdf
    • https://static.usrfiles.com/ugd/b8c837_309f885dd18e48d99ca897b09141bda4.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e1ad8d22bab4721939337d1cfb05990.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d9adcf7f3cb4488831910998b3b39ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_a79fbc4fff6349d8a55de628fba08f0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a87aba0e8764feda54d5ba9866ba59c.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cb3d912147b4bcf965305c13a1a36b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3430b57eb72440158e15e13c15b71568.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_off00006623.bin
e06000ae0ac4d33aba52c56d2d7c43e7d96aace4e9b8ae26c3db20fdf7ebe729		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6623 4848 bytes
font_01_sfnt_off0000768a.bin
7309c223aa177c299055a9b7bfc9edc664a4492e4a22d780927360e9bf03424d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768A 9908 bytes

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