Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3297b349d8f0a5…

MALICIOUS

PDF

36.1 KB Created: 2020-08-03 12:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1ab6d2b59c2b47d62d24d12a4c286dd SHA-1: 1fce72f93517022f88061687b9ed1b6c5e530a59 SHA-256: 2e3297b349d8f0a5338c21bec082bfe8e04081c8426c4a7eaadba8c894d235bd
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=something+anything+someone+anyone+somewhere+anywhere+exercises+pdf', is flagged as pointing to known malicious redirector infrastructure. The document body itself is heavily obfuscated but appears to contain the same URL, suggesting a deliberate attempt to lure users to a malicious site. 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.ru/pify?keyword=something+anything+someone+anyone+somewhere+anywhere+exercises+pdf
    • http://files.warrior196.org/uploads/1/3/1/3/131384401/7372290.pdf
    • http://files.kootneyresorts.net/uploads/1/3/2/6/132681823/d170a8faf99.pdf
    • http://files.cedarspringschristianchurch.org/uploads/1/3/1/4/131483445/8290315.pdf
    • http://files.thomaslhiegel.com/uploads/1/3/1/1/131164236/bagojinetafe-wekifamaxu-rutibewoz-takegoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/sogewukavewezogap.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/vokuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/89491397329.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/xuwiviwesinofosupedufeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3799/8754/files/tawuxoriwak.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/dunajusotekuridoromufe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/23570042910.pdf
    • https://cdn.shopify.com/s/files/1/0433/5176/9247/files/88232910599.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/jidalenidupupuwoxisepenuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/0911/2226/files/25712701869.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_off00004e46.bin
1df51b3be6303b67a3d343cfd7e1ce0bc0f04063d651fa7dcb5448cea388e975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E46 5900 bytes
font_01_sfnt_off00006250.bin
293bfecede98bf71081f64cd74a724f6228636bcd5b94db364d12ebd9b614891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6250 9544 bytes

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