Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e9877ff753474d…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 14:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be078c857f83284c6186c3643436a91d SHA-1: 6906daa5af58b574fbe1a1321bdf16ac1526530b SHA-256: d3e9877ff753474d04b3479a52f6be17f758b2d02cf187a5d57eea0de7a5fdb3
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 'ttraff.com'. The document body, though heavily obfuscated, contains text fragments suggesting an IELTS reading topic, which is likely a lure. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be directing the user to a malicious site via the embedded link.

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=wolves+dogs+and+humans+ielts+reading
    • https://static.usrfiles.com/ugd/73cb9e_ddaca55eefaf431eabf6289a69af415e.pdf
    • https://static.usrfiles.com/ugd/f09a9d_e7b94d74a0e441c6b3d80420d9507fa9.pdf
    • https://static.usrfiles.com/ugd/d902bb_9a2c642800244f238714c45fcf088628.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/67680934199.pdf
    • https://static.usrfiles.com/ugd/b6edda_eb3eea8f0d0f4095863ca514075fb813.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_ad0cd77fc162417582fdba029b3591d0.pdf
    • https://static.usrfiles.com/ugd/33a16d_c6586162bba945d0b01fa3b175b47689.pdf
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/manual_anchor_windlass.pdf
    • https://cdn.shopify.com/s/files/1/0460/1230/1479/files/avionica_rsu_ii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/1237878365.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/
    • https://cdn.shopify.com/s/files/1/0430/4

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f41.bin
dfdf474b2cb60f9b0852c5227fb4264626ad1c62de9246d517f67226bad1f838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F41 5312 bytes
font_01_sfnt_off0000812f.bin
3e21f3b662715611ad629db6ae047f470fd94777f7ab53fc958e7593d9ae2455		 pdf-font-stream PDF embedded font (sfnt) at offset 0x812F 10164 bytes

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