Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7536f683d4b7851…

MALICIOUS

PDF

33.3 KB Created: 2020-08-21 18:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3eb3aace5d794997181d5c2c24546eec SHA-1: da97da7c985de504c39e3d54c733069b2974c40e SHA-256: a7536f683d4b785138e0d70a470fb23ebce992df4cbdb639fd91b01d6e83347a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF file exhibits characteristics of a link farm, embedding numerous URLs. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.ru/pify?keyword=children%2527+s+songs+video++free', suggesting an attempt to lead users to malicious content. The document body, though heavily obfuscated, also contains this URL and other embedded links, reinforcing the attack pattern. The presence of many links, including those hosted on Shopify, points towards an SEO poisoning or link farm strategy to distribute malicious content.

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=children%2527+s+songs+video++free
    • http://files.devinesolutionsiowa.com/uploads/1/3/2/6/132682681/2823834.pdf
    • http://digife.servicesveterinairesambulatoireequin.com/uploads/1/3/1/3/131398222/tikef.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/vagisusiso.pdf
    • https://cdn.shopify.com/s/files/1/0432/2181/1364/files/get_post_meta.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/iccid_check_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/fusifujosoronirulatamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/chapter_3_science_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0439/5014/5704/files/belkin_n300_extender_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/guwesosud.pdf
    • https://cdn.shopify.com/s/files/1/0432/9196/7652/files/27730742422.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/13533293228.pdf
    • https://cdn.shopify.com/s/files/1/0444/2639/5814/files/alcatel_lucent_ip_touch_4068_manual_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0459/5636/6495/files/wiggle_song_whistle_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/85940783317.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_off00004618.bin
8e04dd65bd4f66677e41dc3cc0a51013b9f396ccfc68217545859c12271ff0e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4618 4960 bytes
font_01_sfnt_off000056f5.bin
6f32e3675f029dd028a4b9ad6aeaad7ac3a182eeada4617854469fdae7618f44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F5 9736 bytes

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