Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2957116a942c94…

MALICIOUS

PDF

43.7 KB Created: 2020-08-01 23:13:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53c0d821df3c54c1302d6ae518ca725a SHA-1: dd40efad66579e5d615793c74ec4760eec12c934 SHA-256: 3e2957116a942c941508000e46d7b90bb90815553879227910878687e8c338bd
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs users to a known malicious redirector at `ttraff.ru` with a query parameter suggesting a lure for 'Avast registration key'. This indicates a phishing or scam attempt. 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=avast+registration+key
    • http://files.uicbcq.org/uploads/1/3/1/4/131454114/6177993.pdf
    • http://files.headstockofwoodstock.com/uploads/1/3/1/6/131606289/5099590.pdf
    • http://files.theclassicknowledge.com/uploads/1/3/1/3/131398504/jevejevoxanatej.pdf
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/86565912939.pdf
    • https://cdn.shopify.com/s/files/1/0432/7296/2203/files/44949455276.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/bezutaludetukeri.pdf
    • https://cdn.shopify.com/s/files/1/0437/3312/3221/files/javazawazomekenufadaganex.pdf
    • https://cdn.shopify.com/s/files/1/0437/5340/6618/files/vidatigivulumebudot.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/wipukenisigesevosisuwet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94393320092.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/genavudufemarutulofege.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7763/files/3962020711.pdf
    • https://cdn.shopify.com/s/files/1/0433/9898/7926/files/toviwafidowaleputijovap.pdf
    • https://cdn.shopify.com/s/files/1/0429/2342/5955/files/fiselazolabadafa.pdf
    • https://cdn.shopify.com/s/files/1/0437/9780/7265/files/35295257770.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/81094591632.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/32679941112.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f56.bin
37d574689f9fd1d8bf7d4be630e3a044a0f4a72ae9ef277814498a224a8c58a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F56 4824 bytes
font_01_sfnt_off00006fcf.bin
548fb1df6e572536e987b5dea019fa716f8cdde192c4349eb5c0aa1beb7f93b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCF 10764 bytes
font_02_sfnt_off00009425.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9425 4324 bytes