Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d78e2d330ef9a59…

MALICIOUS

PDF

41.2 KB Created: 2020-08-27 23:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3b778f2e5baaa43ae63679d8a711d97 SHA-1: 4e088ea08be9f498084bd48a52fd75b1dcca896f SHA-256: 1d78e2d330ef9a59c3afab239a5f36a46d3130831fbe514df7e1638709a47476
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector to a known malicious domain. The primary link directs to https://ttraff.cc/pify?keyword=radio+flyer+car, which is flagged as a malicious redirector. The document body is heavily obfuscated and appears to contain junk data, but the presence of the malicious link is the strongest indicator of malicious intent. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, likely for SEO poisoning or to distribute malware.

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.cc/pify?keyword=radio+flyer+car
    • http://files.annalisavivona.com/uploads/1/3/2/3/132302923/3e16c6c3.pdf
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/roxomigojeruputiwador.pdf
    • https://cdn.shopify.com/s/files/1/0434/4902/4669/files/fiwajopusi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6630/files/32618314934.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/21376114507.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/11084268109.pdf
    • https://cdn.shopify.com/s/files/1/0447/9565/8389/files/credit_risk_modelling_springer.pdf
    • https://cdn.shopify.com/s/files/1/0429/5399/8489/files/gikum.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/marawaguti.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5415/files/93303254137.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/67082335116.pdf
    • https://cdn.shopify.com/s/files/1/0463/0937/6162/files/nekelof.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/21709501144.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/89681450098.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/69045002707.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_off000063a2.bin
2fbfa1f1df656865624f7e19e73301ba2b220508961ec7b55d06f6a8061d84f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A2 4944 bytes
font_01_sfnt_off0000748e.bin
69756f91a2f5dd0afb958ae256c0fa41e73bdff8ce8dcc1a10af31bf7fed5a0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748E 10532 bytes

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