Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc98f0cdbb3d6da…

MALICIOUS

PDF

53.8 KB Created: 2020-07-30 20:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 439e87c8275a87eedd85c7d45531c8e9 SHA-1: f5593ac5390d88c6e675108fe9e8e5a777c1b957 SHA-256: 7fc98f0cdbb3d6da37657e4e375ecb3642888f9c561dc9b871a7e64555ccd6a5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.ru/pify?keyword=interview+questions+and+answers+for+software+engineer+pdf', is flagged as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, and the document body was heavily obfuscated.

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=interview+questions+and+answers+for+software+engineer+pdf
    • http://files.jahafrica.com/uploads/1/3/1/4/131438539/tikifoporeba.pdf
    • http://files.thewrightauthor.com/uploads/1/3/1/4/131407709/vuzivalebi.pdf
    • http://files.toddphillipsmusic.com/uploads/1/3/2/3/132302716/volajixotepedu_fevikawadidemij.pdf
    • http://files.sunpawco.com/uploads/1/3/0/7/130740357/5894626.pdf
    • http://files.vanvolleyleague.ca/uploads/1/3/0/8/130874642/zavixav.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6914/files/xipuka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdf
    • https://cdn.shopify.com/s/files/1/0431/0718/8898/files/mikukode.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/nukuverolapotem.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/julamul.pdf
    • https://cdn.shopify.com/s/files/1/0435/1921/3727/files/1568712076.pdf
    • https://cdn.shopify.com/s/files/1/0434/3955/4727/files/62200013540.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/71464844332.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/97098861283.pdf
    • https://cdn.shopify.com/s/files/1/0433/4636/2533/files/72499177727.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/gusar.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_off00009471.bin
f86e0477a2e147ea33e12498c9ae30b012242b6bedea80dfb6684c51a6b71751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9471 5272 bytes
font_01_sfnt_off0000a67c.bin
7bce27a59296624256e82b28258683cef8490e2fb1519ea1eba7a9c58da3cab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA67C 10408 bytes

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