Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfef4963ad9112b4…

MALICIOUS

PDF

37.9 KB Created: 2020-08-26 20:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 859c8c2df9b21d8ba9e140311b69c4ef SHA-1: c2b179b6f2c1323834db6f22bf4ac1dfc49fa9ff SHA-256: bfef4963ad9112b41a7d4358cb44e99344257247f470e82521b44f234937cf02
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is part of an SEO poisoning or link farm scheme, aiming to lure users to malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=eso+magicka+dual+wield
    • http://files.acuityhearingsolutions.com/uploads/1/3/1/6/131606631/4793957.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/bejudagazuziraveku.pdf
    • https://cdn.shopify.com/s/files/1/0429/9436/8663/files/nogovu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/37711460651.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/89216688150.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/xiruwapejobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99231100330.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9263/files/deretasapabelaxig.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/vuzarosirotosonosepow.pdf
    • https://cdn.shopify.com/s/files/1/0444/2734/6086/files/19656411788.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/sevosaxe.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_off00005603.bin
81d7066c7b953dd87dbc62b7e7cf97ccb32a44eb87da04792f3b4e54bc89b6b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5603 5276 bytes
font_01_sfnt_off000067f5.bin
85a7a34dda1736b027bb23216b4a0480df4901f77b1e59633da901ac140be67a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F5 10376 bytes

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