Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38771e8bf933d55…

MALICIOUS

PDF

35.0 KB Created: 2020-08-18 15:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98c9627aa6d28a3315b4b2b2c19dbee3 SHA-1: 2e0415a31982114de976d64b8bac463c1d60f856 SHA-256: a38771e8bf933d5573aadbfcc9801d6d057caa6c13cf7ac675fe308b92015208
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection strategy. One prominent link directs to a known malicious redirector, ttraff.com, with a keyword that appears to be a lure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=akshara+singh+ke+bhakti+gana+video
    • http://files.gaatn.com/uploads/1/3/1/3/131383377/7103303.pdf
    • http://xumudinaz.johntstephan.com/uploads/1/3/0/7/130775565/2804037.pdf
    • http://wabes.southernaznorml.org/uploads/1/3/1/6/131637306/48004e9c1517.pdf
    • http://misojis.benedictportugal.com/uploads/1/3/0/8/130873851/temodokobajo-minarepulukope.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/17673727492.pdf
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/gosipitiwijowagine.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/newapew.pdf
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/sadusiwebadejofotenozutif.pdf
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/72532188936.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/zozepavepus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7176/6677/files/14052256626.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.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_off00004d2f.bin
9084e237f2697ea11d1c6745829566aeb3e8e3b009d799215dd18a56b5145d82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2F 5308 bytes
font_01_sfnt_off00005f2c.bin
c366a8f2698713110f7904e5267df18f1d64006fc6675e44ed62f32df7b1a1c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 9460 bytes

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