Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9e0943056183e1…

MALICIOUS

PDF

35.4 KB Created: 2020-08-17 02:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7042284f07ec68434a085738363a0b1a SHA-1: 82490044a87428e91d9fca8c023af707f5a37219 SHA-256: 9c9e0943056183e16c285ac616b36cd6e3ff6e50fe767cbe542ae48a5bdf21fa
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=chupa+chups+mini+nutritional+information'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains text related to 'Chupa chups mini nutritional information' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. 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=chupa+chups+mini+nutritional+information
    • http://sibejage.stjohnash.org/uploads/1/3/2/7/132712253/6907704.pdf
    • http://files.thorntonheathcricket.co.uk/uploads/1/3/0/7/130739783/xefivoxolox.pdf
    • http://files.fifteenminutes.co.nz/uploads/1/3/0/7/130740221/tapafuvonod_wikopurip_gefiwujirojo.pdf
    • http://files.solehikidcare.com/uploads/1/3/0/8/130874205/salunowoxazap.pdf
    • https://cdn.shopify.com/s/files/1/0439/5266/8830/files/80017833619.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/fuvimigatal.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4567/files/tekuniluziweka.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3482/files/8773863589.pdf
    • https://cdn.shopify.com/s/files/1/0441/1083/9960/files/sap_accounts_payable_module.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1417/files/wowivuluwotixitiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5353/0788/files/7114662766.pdf
    • https://cdn.shopify.com/s/files/1/0437/6127/0935/files/bilingual_education_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/zebukutizifokuzufipen.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/13160390395.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_off00004c66.bin
a4ffaffdc5f9c8f476e7c68295bff7aa0e9cb64fc0ccfb06f05bd28e28a11e3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C66 5160 bytes
font_01_sfnt_off00005dcb.bin
1a55b51357305d591674768629d36e82b12cf963a1000dca9ad5f712d6ffa7a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCB 10208 bytes