Malicious PDF — malware analysis report

Static analysis result for SHA-256 af5bf7b94dd2de2b…

MALICIOUS

PDF

44.8 KB Created: 2020-08-17 01:10:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88d9f8924381492c46b2d595d20499d7 SHA-1: d3c27cf29298e6457fec7c8cc534abb269befdcc SHA-256: af5bf7b94dd2de2bf45857cb6aee8ffc13952e6a345010287cf9efc4de07e3a7
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 URLs, with one heuristic specifically flagging it as a 'PDF_MALICIOUS_REDIRECTOR_LINK' pointing to 'ttraff.ru'. Another heuristic, 'PDF_SEO_LINK_FARM', indicates a mass of external PDF links, with 'cdn.shopify.com' being a dominant host. The document body, though heavily obfuscated, also contains the 'ttraff.ru' URL and several shopify URLs, reinforcing the link farm nature. The primary attack pattern involves luring users to click these links, likely leading to phishing or malware download sites.

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=bhimavaram+bullodu+movie+songs++com
    • http://files.westernlogcreations.com/uploads/1/3/2/3/132303083/nigodujirusibunasiju.pdf
    • http://files.holyfamilystowathletics.com/uploads/1/3/1/3/131398308/wirusemirutawilad.pdf
    • https://cdn.shopify.com/s/files/1/0430/7117/6855/files/regubusutolasovum.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/suvejuvafigere.pdf
    • https://cdn.shopify.com/s/files/1/0433/6739/9575/files/convert_vsdx_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/nulujifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/north_east_ohio_bounding_box.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/95574791698.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5719/files/brand_positioning_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0437/2840/4632/files/70_000_12.pdf
    • https://cdn.shopify.com/s/files/1/0431/6050/2423/files/zigalozazosoxafo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5576/files/kukefuxavomixeveluwusexi.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_off00006acc.bin
a07d31f6a003f5686847963f74d2e6744e3b83d01ace89284de071ef1008bce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACC 5600 bytes
font_01_sfnt_off00007db2.bin
a31110852a3149e3488fdb8d38593935ab9d11323e0839cd78ff6b25aadb491d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB2 13096 bytes

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