Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbda9a327468659d…

MALICIOUS

PDF

52.8 KB Created: 2020-07-30 23:27:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5acb7cd3c228afab9df21c9aee7be816 SHA-1: e8d7337505b099bd82ae11b2394be709c85d92ee SHA-256: bbda9a327468659d9826ba4616bf5815434530c442c993e0fe6e79f86807f9e5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=que+es+un+riesgo+psicosocial+pdf', is identified as a redirector to known malicious infrastructure. The document body, though heavily obfuscated, appears to contain text related to 'Que es un riesgo psicosocial pdf', suggesting a lure to disguise the malicious nature of the links.

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=que+es+un+riesgo+psicosocial+pdf
    • http://files.yayoishionoiri.com/uploads/1/3/1/4/131453278/f652270f2cf.pdf
    • http://files.deadlinecustoms.com/uploads/1/3/0/8/130813461/4b94cfb.pdf
    • http://files.weatherpaige.com/uploads/1/3/2/6/132681767/pomatevi_fedanevupejo_fopona.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3475/files/navazovo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/jituxonivowutumenug.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/76478900778.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/8130041445.pdf
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/82449351141.pdf
    • https://cdn.shopify.com/s/files/1/0439/8094/7614/files/xukugibajilu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0688/5027/files/lavuni.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lovukapovilelogitolosir.pdf
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/mitumuribam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viloronijiletamuzolodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lipowu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/xamus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/kibemizoje.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_off00008ffd.bin
a83cb844c7607b204a1471a79d27c0a1e3db07f6bf4689e63dd80e8326e7b263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFD 5184 bytes
font_01_sfnt_off0000a19c.bin
4ea9ace21b53edaba56338f22de18db017dce9946d89129f494fe0f8a9ac7aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA19C 11184 bytes

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