Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11c750d1159ff97…

MALICIOUS

PDF

33.7 KB Created: 2020-08-19 19:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e7be9319f94c826a48bd5896b45626f SHA-1: 835677943b14a4ccbef724fdb16d9cc6c1e9c879 SHA-256: d11c750d1159ff97334164488878fb8b605686197fa8f2091011c90a8acf0a39
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains the string 'snake game nokia apk' and the malicious URL, suggesting the lure is related to a game download. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=snake+game+nokia+apk
    • http://files.bennewitzdds.com/uploads/1/3/1/8/131872021/a39f0fd.pdf
    • http://files.kelwoodyoga.com/uploads/1/3/2/7/132740545/50f5c51504.pdf
    • http://mepufawaz.princeopeace.org/uploads/1/3/1/3/131398140/b644f9bba760ed.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/45967340496.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0487/files/50596009397.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/35053533597.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/virgil_aeneid_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/68875639810.pdf
    • https://cdn.shopify.com/s/files/1/0462/8119/5680/files/saforodaxaxevijugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7658/2552/files/17548612248.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/jabosejukiwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/47693697228.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/59597640170.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_off0000465a.bin
977e57c32651cbd2d78bc59778fe141f102f099ab349233d221ac9194c3139e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x465A 5000 bytes
font_01_sfnt_off00005752.bin
ae58fbade3933aa7a1dfd32deacf407e0c8c478ea595faf08c2490467c911d8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5752 10352 bytes

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