Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf5918dab836e1a7…

MALICIOUS

PDF

39.5 KB Created: 2020-08-24 04:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff6575f7b9eaf1ffc306b1cec43268c7 SHA-1: d69e5029b42c1b9f11715fd2825877a0375394a2 SHA-256: bf5918dab836e1a72d15d9892265ea6998cc0d5f2e567c0d6c3b020b42cfcf11
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK. The primary link, 'https://ttraff.ru/pify?keyword=free+word+document+checklist+template', appears to be a lure for a free template, but redirects to malicious infrastructure. Another heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the document body and heuristics strongly suggest a phishing or redirection attack.

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=free+word+document+checklist+template
    • http://gawid.yctfashion.com/uploads/1/3/0/8/130814535/ee73f461c0.pdf
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/69231758311.pdf
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/munexabugifivediwikexaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/fapoxojuzijapabo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/47009193570.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/8772033183.pdf
    • https://cdn.shopify.com/s/files/1/0445/9646/1732/files/19289023099.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/porcupine_tree_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0430/9948/8423/files/gugunokafudorutarof.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/suvur.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_off00005d7d.bin
cd76e295af59c74f1034aa808e3b85db6b2543b6550c99c16c3373000d0d7742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7D 5424 bytes
font_01_sfnt_off00006fc9.bin
53b6dca1ea68fe4d5ba6b565a19397c2f94c9cd43de640263ba45afa94c3eaa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC9 9860 bytes

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