Malicious PDF — malware analysis report

Static analysis result for SHA-256 f51087d5dc012a28…

MALICIOUS

PDF

40.9 KB Created: 2020-07-30 09:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0698f8166105d75fcd81d73ed6becd10 SHA-1: 504bca3929a3918b4c359b195071a8ef3f3f86ab SHA-256: f51087d5dc012a28123455405a495be36c8e5e94b5975de0970d00ed8f5c15d7
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links, one of which leads to a Shopify domain. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to a malicious URL, likely for phishing or to download further malicious content.

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.com/pify?keyword=birsen+yay%25C4%25B1nevi+sap2020+pdf
    • http://files.lavenderbluevintagedesigns.com/uploads/1/3/0/8/130874029/8158420.pdf
    • http://files.rotterdamenglishspeakingtheatre.nl/uploads/1/3/1/4/131452735/dujigowalu_sewugumibafek_gomoxesorita_rutijoxe.pdf
    • http://files.sallyarnold.com/uploads/1/3/1/6/131606480/06a5f8.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/96685476752.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2214/files/65407077468.pdf
    • https://cdn.shopify.com/s/files/1/0431/8219/4852/files/20141812030.pdf
    • https://cdn.shopify.com/s/files/1/0434/0855/6182/files/pitodibizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/43381599423.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7626/files/18631950145.pdf
    • https://cdn.shopify.com/s/files/1/0435/1721/4874/files/todavekomozafutobuwuxega.pdf
    • https://cdn.shopify.com/s/files/1/0428/9334/4924/files/684777890.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/15894794906.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/42230999061.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.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/
    • https://cdn.shopify.com/s/files/1/0

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e75.bin
e0ec78f2166e40c21d6963754aa7b54d63e494fd731541a95e6e628330962b7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 5116 bytes
font_01_sfnt_off00006feb.bin
6ea6d1eca2e1ec3fb09a3fe55c49e7e123a3c49433a30c09f72a813120d60a25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEB 11812 bytes

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