Malicious PDF — malware analysis report

Static analysis result for SHA-256 50914d0e8928cd0c…

MALICIOUS

PDF

41.9 KB Created: 2020-08-18 18:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6f891d551375ee943fdfc8980ce1e4d SHA-1: 27ca94f19ebb80e70ebdea8121280374e1181260 SHA-256: 50914d0e8928cd0cf2b4e48ebfb779bf237b05d48b8f2a1b7d75647846dd2b55
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also assigned a high probability of maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.ru', are indicative of a phishing or malware distribution scheme. No scripts were extracted, but the structure of the PDF itself suggests a malicious intent to lure users to external sites.

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=jogos+psp+pc
    • http://xaxudi.ingridasanchez.com/uploads/1/3/1/4/131437237/gukewogoveru.pdf
    • http://julugad.donnastocker.com/uploads/1/3/0/7/130775934/lerubexelamabulubok.pdf
    • http://lamatefas.shellystill.co.uk/uploads/1/3/1/0/131070161/f0bc0c86990cbf.pdf
    • http://dajoge.northernfrightsfestival.com/uploads/1/3/1/3/131384240/zekibam.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/nuvufimuwata.pdf
    • https://cdn.shopify.com/s/files/1/0434/9581/7382/files/jokam.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1412/files/28514852328.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99324429390.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/fojisofomobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/21834317117.pdf
    • https://cdn.shopify.com/s/files/1/0435/1026/8064/files/nefisoxas.pdf
    • https://cdn.shopify.com/s/files/1/0438/4640/2198/files/kuwita.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/85104300368.pdf
    • https://cdn.shopify.com/s/files/1/0433/6094/4296/files/balance_of_trade_definition.pdf
    • https://cdn.shopify.com/s/files/1/0440/7299/2918/files/carrom_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/85024190597.pdf
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/arithmetic_sequence_and_series_worksheet_with_answers.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_off000068fd.bin
d2abb37bf62e2766b51ccd5fa493d9facfccbccaed89db0a6240902022ba8ad2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FD 4752 bytes
font_01_sfnt_off00007942.bin
f99f665c11bc363510ad68159e4a062b7d3cbe98730d154877990110367f54ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7942 9932 bytes

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