Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cbb4ad7219dc15f…

MALICIOUS

PDF

66.1 KB Created: 2020-08-23 11:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdfed5fc66691b2f7a62ebbec0ed677e SHA-1: aac9773bc1de761ddb2b1ff4591c3beda1aef2da SHA-256: 4cbb4ad7219dc15f9fd0af0c944a4e5fd3d635d28b714c840725c8ba10189277
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=3ds+max+2015+vray+plugin+free'. This indicates a social engineering attempt to trick users into downloading potentially harmful content by offering a free software plugin. The document body also contains this URL and a list of other URLs, many hosted on Shopify, likely to create a link farm for SEO poisoning or to appear more legitimate. The primary malicious IOC is the ttraff.com redirector.

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.com/pify?keyword=3ds+max+2015+vray+plugin+free
    • http://files.msarredondo.com/uploads/1/3/1/4/131410818/2012795.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/41842110523.pdf
    • https://cdn.shopify.com/s/files/1/0435/9569/4239/files/project_nevada_ttw.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/community_bundles_stardew_valley.pdf
    • https://cdn.shopify.com/s/files/1/0432/7401/0782/files/beps_action_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8022/files/nisuwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7410/0127/files/imessage_for_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0429/2552/3103/files/apk_cheat_game_android_terbaik.pdf
    • https://cdn.shopify.com/s/files/1/0436/6522/7929/files/5493166337.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/dedizitevulazowe.pdf
    • https://cdn.shopify.com/s/files/1/0440/0126/3766/files/our_world_phonics.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2261/files/47145905946.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6556/files/4856_fillable.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_off0000c536.bin
0f725a00f7e732f86ad3addfd04258e8ef4ab9802654b1475fdc9e5164ef6300		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC536 29968 bytes
font_00_sfnt_off000087c1.bin
6367a5dfd831f431b444c797122e5c4ccda78c17c8f2a368f1973ccf257aa221		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C1 6112 bytes
font_01_sfnt_off00009c83.bin
446b12a10144cf5d2c77daa246e4758f3a26520aaaf9f1f124d5a834cb950299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C83 13184 bytes

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