Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e81508d1dee82f…

MALICIOUS

PDF

50.7 KB Created: 2020-08-19 00:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64a83cf27d095b924ad403a166f50616 SHA-1: 0ddf3eaa91479e1aed7363dbc681e9502e7ebf16 SHA-256: c5e81508d1dee82f6cf4d48ce5a44ecaaad948e392861fa20882e670fcda65b8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link. The embedded URL leads to `ttraff.ru`, which is known to host malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The PDF also contains a large number of external links, many pointing to Shopify, which is flagged as a link farm.

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=aerohive+ap122+installation+guide
    • http://files.tanyacollier.com/uploads/1/3/0/7/130775980/8089867.pdf
    • https://cdn.shopify.com/s/files/1/0433/0386/2440/files/sufum.pdf
    • https://cdn.shopify.com/s/files/1/0434/1746/9080/files/steward_full_form_in_hotel_industry.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.pdf
    • https://cdn.shopify.com/s/files/1/0429/8312/9251/files/kopisiwuwito.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/7007/files/42288114105.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9973/files/dupadezofejunevuwakisudu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6657/files/fusobox.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/zopiwanolawumoje.pdf
    • https://cdn.shopify.com/s/files/1/0436/9688/1814/files/sumapi.pdf
    • https://cdn.shopify.com/s/files/1/0459/2258/2679/files/blanco_oven_user_guide.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_off00007c40.bin
b20a97d0dac1e3714c17097304569dea9564984458f76bcd122479f98b68759c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C40 5336 bytes
font_01_sfnt_off00008e66.bin
c3b2af9647ecef9c5b42afa97ec994a54ed7a8fd63958db1be2cc924d35ec42d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E66 9736 bytes
font_02_sfnt_off0000afd3.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD3 4324 bytes

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