Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7416f8f54de1b6b…

MALICIOUS

PDF

42.4 KB Created: 2020-09-11 13:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 635b5a38e93fd0c55acdc8a78196c9b7 SHA-1: 7ad8c39c045274ec4132a0509428b9313166cfbc SHA-256: f7416f8f54de1b6b8f5e27d629b3459e2ac9b0276918b0ddd182b0e8823a847e
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=business+english+for+beginners+a2+pdf'. This URL is presented within the document body, suggesting a lure to trick users into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector. No scripts were extracted from this sample.

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.club/wix?keyword=business+english+for+beginners+a2+pdf
    • http://files.southsurreygardenclub.ca/uploads/1/3/1/4/131453109/9582919.pdf
    • http://files.wallermarchingfestival.com/uploads/1/3/1/0/131070207/1f97018b418.pdf
    • http://files.upliftedforlife.com/uploads/1/3/1/4/131437172/zakexatidin.pdf
    • http://fibewo.jpligallery.com/uploads/1/3/2/8/132814989/8c54c2b91d11e77.pdf
    • http://vezab.stjohnlutherans.org/uploads/1/3/1/4/131413418/pitibu_bamof.pdf
    • https://cdn.shopify.com/s/files/1/0463/4158/7100/files/chopsticks_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puliwaxaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/5264/5017/files/al_bukhari.pdf
    • https://cdn.shopify.com/s/files/1/0431/7088/9892/files/rimezokapazu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8029/2254/files/aws_summit_2016.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/54933404230.pdf
    • https://cdn.shopify.com/s/files/1/0434/2192/5525/files/zolawepes.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/86233261142.pdf
    • https://cdn.shopify.com/s/files/1/0462/8463/6320/files/31339054671.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000594a.bin
25b5b47267ff074154af319846d37971dc048983635439129aebd5d3227488b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x594A 5424 bytes
font_01_sfnt_off00006ba0.bin
dabd5a84eb32a4b76b7fc52893448c03e01c5eee346675a057e15820222b9d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA0 10256 bytes
font_02_sfnt_off00008e72.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E72 4324 bytes

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