Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9732cb7966300e…

MALICIOUS

PDF

44.7 KB Created: 2020-08-24 00:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6750bc489f74f034d069b944908ca458 SHA-1: 88b4ff6983370fad05ed1d33b32ec6c6d5ff1564 SHA-256: ec9732cb7966300e2ddb3c1347829c09e9ae91b4f67a50a61947187791ff6ef3
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a high density of embedded links, a technique often used for SEO poisoning or to direct users to malicious sites. One critical heuristic flagged a link to a known malicious redirector, traff.ru, which is likely the primary malicious payload. The document body contains garbled text and embedded URLs, including the redirector and several Shopify-hosted PDFs, suggesting a link farm designed to obscure the malicious destination.

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=shayari+by+video
    • http://files.donshort-artscaper.com/uploads/1/3/0/8/130813777/nizexatifevak.pdf
    • http://files.denglenntraveljunkies.com/uploads/1/3/1/3/131398555/73c5871f.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/hex_to_float.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/sigixuguxofidu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9867/6131/files/sketchup_layout_templates.pdf
    • https://cdn.shopify.com/s/files/1/0434/1032/5671/files/50880501517.pdf
    • https://cdn.shopify.com/s/files/1/0432/2829/9427/files/famidipila.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9267/files/64520717181.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/wasenejabonefomixupete.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/email_extension_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/tutiwirutejumevu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0252/7895/files/xiwawafek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.pdf
    • https://cdn.shopify.com/s/files/1/0438/3696/5029/files/waduwexugusimisidevo.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
stream_005_off000082fa.bin
3dbeea0aa72e6cbc6e9ebad64fb2379a50af65333c4b67b0d2ac34cc26304327		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x82FA 20944 bytes
font_00_sfnt_off00004b43.bin
92c8e56a4b1c00e4070e76a64c0d800085230edc0eea91cd1eeb500075cc80af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B43 5108 bytes
font_01_sfnt_off00005c9f.bin
159d8f5f584644454498ac83f93bbaf6e291f5611248fcd1cdb4faabe7382f2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9F 11624 bytes

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