Malicious PDF — malware analysis report

Static analysis result for SHA-256 9102a73926c4a1b6…

MALICIOUS

PDF

82.1 KB Created: 2020-08-06 20:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63e8aa05c27cf9b688dca0b834003391 SHA-1: ae72fd24f1be08d2a21da38d107f1788d49d7894 SHA-256: 9102a73926c4a1b60d00978e960cd4f7c4e15a191a08eee3765cb2f81ec39d3c
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

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.ru/pify?keyword=factors+affecting+buying+behaviour+pdf
    • http://files.justincayd.com/uploads/1/3/0/8/130814601/500ba635ded.pdf
    • http://files.provisopartners.com/uploads/1/3/2/8/132814342/c89b827ccd21.pdf
    • http://files.swatarachurchofgod.org/uploads/1/3/2/6/132681409/559358.pdf
    • http://files.gipilates.com/uploads/1/3/0/8/130814714/382ba.pdf
    • http://files.orangevalleycreations.com/uploads/1/3/1/3/131383510/bujofaketuwomidabej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6304/1430/files/motakiboz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8649/6415/files/ge_common_documentation_library.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6783/files/49005223840.pdf
    • https://cdn.shopify.com/s/files/1/0438/1143/8752/files/taresiviruwaxewubawi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/71050701992.pdf
    • https://cdn.shopify.com/s/files/1/0434/4417/5013/files/kezuxulun.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/vodiroxazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/bamunuxowen.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8607/files/93615079292.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/miwokikiguxojejegemonas.pdf
    • https://cdn.shopify.com/s/files/1/0436/0699/9203/files/test_your_vocabulary_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6882/files/merigafetime.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_off000103a6.bin
c177d7aea145ab7c32d5f63f9670e4ff6463d55cf6cfa377af40c15465eddbb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A6 5644 bytes
font_01_sfnt_off000116db.bin
6e8756a49d7a7ea5c2924d4f1707d906d81d1515166330057f72baf133f6a9e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116DB 10828 bytes

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