Malicious PDF — malware analysis report

Static analysis result for SHA-256 b712ca5a9a532be2…

MALICIOUS

PDF

51.1 KB Created: 2020-08-22 01:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7e9aa5e38b335865cc93b00e7f9a792 SHA-1: 60eb22e7c05b5abb117e7565a4caabee7e05e0d3 SHA-256: b712ca5a9a532be27ac1b32230a0b2758778cda0142b4215a00abdd5de7c81ca
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically flags the URL https://ttraff.cc/pify?keyword=demographic+profile+pdf as malicious. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm designed to obscure the true malicious destination. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=demographic+profile+pdf
    • http://files.seabrookband.org/uploads/1/3/2/7/132740186/ritokozop.pdf
    • http://pafubesel.alexandrahaleyart.com/uploads/1/3/0/8/130874679/2381894.pdf
    • http://bukegu.patriciamacdonaldart.com/uploads/1/3/0/8/130874332/a38d493952f4e28.pdf
    • http://dageba.coalesceconsultants.com/uploads/1/3/1/3/131384609/e4b1cb3c0892df.pdf
    • http://files.uintahonline.com/uploads/1/3/1/4/131454172/pinoruj-wumeviwi-zabelodarut-tujavojitak.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/supepofenexuxivadova.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/savumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8770/files/42798088312.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3245/files/chi_franciscan_webapp.pdf
    • https://cdn.shopify.com/s/files/1/0449/7778/2952/files/financial_accounting_basic_mcqs_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/mapidi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0099/files/bitdefender_anti_ransomware.pdf
    • https://cdn.shopify.com/s/files/1/0429/3463/2607/files/64910407612.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/check_jupyter_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/mergers_and_acquisitions_valuation.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_off00007a28.bin
e602ae73ce6c3828509b0d5bff7bb516596bc9ac6db7332533fbf40ce8e03867		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A28 5392 bytes
font_01_sfnt_off00008c5a.bin
ec9f78e61a238d0a02b9313ffe8391a983ff9d148203e8cc04fcd42b30661be7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5A 16508 bytes

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