Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1cc81736a43a5e6…

MALICIOUS

PDF

34.0 KB Created: 2020-08-11 12:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a06451d7ef3e8fccb5b5093d53be33dc SHA-1: 41d7fa817311dfa71dfecd0b43a762c0d4d793bf SHA-256: e1cc81736a43a5e6f7c26f18f22bf5a73909c90879514eacaedb1f3e8e14a579
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, designed to trick users into downloading further malicious content under the guise of educational material. The document body text and embedded URLs strongly suggest a phishing or malware distribution lure. The ML classifier also flagged this PDF with high confidence.

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/pify?keyword=pradeep+biology+class+12+pdf+free+download
    • http://files.patriksoderstam.com/uploads/1/3/1/6/131636825/4420188.pdf
    • http://nijet.laslenguitasclasses.com/uploads/1/3/0/7/130775934/2040041.pdf
    • http://files.rebelliousrheaboutique.shop/uploads/1/3/1/4/131406413/2090860.pdf
    • http://files.whipitalatte.com/uploads/1/3/2/6/132695813/busuxamaku.pdf
    • https://cdn.shopify.com/s/files/1/0435/8373/3915/files/vatesoreranufiruxoxojoxom.pdf
    • https://cdn.shopify.com/s/files/1/0437/1713/2456/files/66702292550.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/26339068798.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/68580600263.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1783/files/2003_jeep_grand_cherokee_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/83718148406.pdf
    • https://cdn.shopify.com/s/files/1/0429/0753/3475/files/endocrine_causes_of_hypertension.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/writing_winning_business_proposals_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/39505297400.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/bovesejaraxexugetimeto.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/81587338078.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_off000046c7.bin
da6c488f038179f2b68358b3e2bb9cee4d88c08ec1308494d8a4befa57a8dd07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C7 5844 bytes
font_01_sfnt_off00005acc.bin
8e18c59fa79516155e2f8bb9a0312d21ab3a65440f13df0d3984e4e226d481f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACC 9516 bytes

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