Malicious PDF — malware analysis report

Static analysis result for SHA-256 790eadabf66ff9af…

MALICIOUS

PDF

47.7 KB Created: 2020-09-01 01:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06a3dd22d81ae7b1918667d363cd664a SHA-1: 85567705b6bddeb405634d2927f613fce322fc7c SHA-256: 790eadabf66ff9af46ff05b81df11027c6ab7becbadcbb11445516dc0a0efd69
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a PDF redirector link pointing to ttraff.com. This indicates the document is designed to lure users to a malicious site. The presence of a large number of external PDF links, while many are benign, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

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=sqlite+create+table+datetime+format
    • https://static.usrfiles.com/ugd/9734e7_21672c55a5bb40bab92357f4c27e58f1.pdf
    • https://static.usrfiles.com/ugd/a91264_8d870b4e28564423a25833c7678801e6.pdf
    • https://static.usrfiles.com/ugd/74a852_d0b04d798b4d4844abe098d5c8cfc18d.pdf
    • https://static.usrfiles.com/ugd/b8c837_831ea1ebc0e44584ac9a44771be2d06a.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/wimimuketos.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/puxolobefovabale.pdf
    • https://cdn.shopify.com/s/files/1/0440/1925/3413/files/inequality_review_worksheet_algebra_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/cello_quartet_sheet_music.pdf
    • https://static.usrfiles.com/ugd/07625c_a12a0aeb20c94eb39c6b9bafa0a42c79.pdf
    • https://static.usrfiles.com/ugd/162fe6_3c7a100d9e854f6083cbb7c3aeb8f10d.pdf
    • https://static.usrfiles.com/ugd/86319b_b6b1c3de794147ce9ecce10b6df75ae3.pdf
    • https://static.usrfiles.com/ugd/87d215_2598a6b605a54a83b5de3493e33561fd.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_off00006e32.bin
95258710c21ef4c434d791cd8fe6452d12fdd2ba5a5453b81741c002cc7399c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E32 5356 bytes
font_01_sfnt_off00008052.bin
6491339be05bbef172e344707ea0d92651a52eab51360da74f47f7f74f8a583a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8052 15828 bytes

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