Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b3e02ca7f0d633…

MALICIOUS

PDF

40.8 KB Created: 2020-08-12 11:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 689b58448afb84ff9f10b6aaec676ae9 SHA-1: f8cf62dfce74aeb87d6d48ce4196a9c16098ea07 SHA-256: c5b3e02ca7f0d6338ace4af078161ffe9344d332153d5a27afaf6354e1c0bcca
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=protein+shakes+recipes+pdf'. This indicates the document's primary purpose is to lure the user to this malicious URL. The presence of numerous other external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase the visibility of the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the malicious redirector is the clearest indicator of intent.

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/pify?keyword=protein+shakes+recipes+pdf
    • http://files.geophysical.eu/uploads/1/3/1/4/131407406/pusevidusep-jakalojaminuvo-tujijo.pdf
    • http://files.fpfequinesupply.com/uploads/1/3/0/7/130775862/7598898.pdf
    • http://files.iamanonymoused.com/uploads/1/3/1/0/131070476/847434.pdf
    • http://bitefak.starkhowell.com/uploads/1/3/1/4/131410685/c83953.pdf
    • https://cdn.shopify.com/s/files/1/0428/7715/7542/files/67113208503.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/campylobacter_jejuni_patogenia.pdf
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/poguzazenodusetekoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/xilegoriza.pdf
    • https://cdn.shopify.com/s/files/1/0434/2356/3925/files/lidemufumevukox.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/54657238529.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.pdf
    • https://cdn.shopify.com/s/files/1/0451/1842/3194/files/television_production_broadcast_journalism.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/lowes_highland_heights_ky.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50751207741.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/kilozezidizisav.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_off000060c0.bin
f891388b7410d6c77f0731055e757482b1093e00d664aa289962b043bb266fda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60C0 5276 bytes
font_01_sfnt_off0000729f.bin
d5342a2071cad6ed735e070fb82c38cbe4a4d60510975146c34be50237faa74f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 10524 bytes

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