Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c2fb7bcb3aa6f6…

MALICIOUS

PDF

45.4 KB Created: 2020-08-14 10:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b5d1a9746eb038689be8c5733abb11f SHA-1: 0b870bb5a99ae6fa6d5d1ce6a0706361174fa757 SHA-256: 39c2fb7bcb3aa6f656b9c6660e813ffbc105781dad9ae5c333b1eb5aba8fce39
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=crystal+reports+runtime+version+2011'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify and other domains, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. No scripts were extracted from this sample.

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=crystal+reports+runtime+version+2011
    • http://gotopana.bexbourne.co.uk/uploads/1/3/0/7/130775403/54dd21f.pdf
    • http://kijamaxil.abouttimeband.co.uk/uploads/1/3/0/8/130874104/f156883d41.pdf
    • http://files.kellygillespie.org/uploads/1/3/1/4/131411539/c115eae88df2bf3.pdf
    • http://files.rhondastruminger.net/uploads/1/3/1/0/131071076/1562942.pdf
    • http://files.synchroski.org/uploads/1/3/2/6/132681698/a3893af0b85d92.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/74260565393.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/zedejojul.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/79034508040.pdf
    • https://cdn.shopify.com/s/files/1/0439/0069/8792/files/59023120153.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/76744522500.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/haley_morales_lena.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/redodaxubiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/8063/7859/files/78890947459.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0741/files/90879655136.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/37064494843.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/7424939121.pdf
    • https://cdn.shopify.com/s/files/1/0435/6007/5427/files/91927830063.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_off00006d01.bin
49b908d03a0fe62177da76657f7328078e778b6d1ea7152256fb48ea12b87bed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D01 5360 bytes
font_01_sfnt_off00007f30.bin
6361a0c3f7890e7bb82d115c84004abf9ff6901cce0afe49c3c9cec5af687869		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F30 13088 bytes

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