Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ff80db803fc69b…

MALICIOUS

PDF

41.0 KB Created: 2020-08-02 20:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f461fa5568dc01b4b4060723164fc7f SHA-1: c9585e6ecaa2569c85dc9a68940faf022707715d SHA-256: 34ff80db803fc69b678b004dbb916c61937fd2dea712a37f65b86ba5eefaf1b0
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding numerous external links, many of which point to PDF files hosted on various domains, including Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=git+unstage+commit'. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of a large number of PDF links and a malicious redirector indicates a likely attempt to either distribute malware or phish for information through a chain of redirects.

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=git+unstage+commit
    • http://files.trustonyu.com/uploads/1/3/0/8/130814644/6894260.pdf
    • http://files.resiliencegrowshere.org/uploads/1/3/1/4/131438211/zopusadufa.pdf
    • http://files.burntbarn.com/uploads/1/3/2/3/132302868/0b308ec9.pdf
    • http://files.oliviashairhooked.com/uploads/1/3/2/6/132681501/1194210.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/mapibizowezavebetovot.pdf
    • https://cdn.shopify.com/s/files/1/0437/2663/5157/files/wovefamolewojezo.pdf
    • https://cdn.shopify.com/s/files/1/0441/1149/5320/files/vuruxolosapi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2105/7700/files/nomunuju.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/3486370448.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/92075030838.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/mesiforopawokukafozer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19441108854.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5445/files/kubigaragubizixenuriji.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/85619344636.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2903/files/1243716996.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_off00005d0d.bin
47ff08a555b76b591b7802e33992b003cf9d5edfd3e248e1507bf017355bf451		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0D 5020 bytes
font_01_sfnt_off00006e1c.bin
6ea26ad72f976f5fd79b322bc1981e9c165c49c075c3a10a2021a1e62f641f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1C 12972 bytes

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