Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77ab97c20a2706c…

MALICIOUS

PDF

35.3 KB Created: 2020-08-30 18:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff1694cb4f53bce648a3757faeb56b72 SHA-1: 37df6b52fc8dfd60333077c5fbb74db6815d4d1b SHA-256: d77ab97c20a2706c721c1be0ff2c2454b253fb4b7e8f92264790dcbd97373507
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 a critical heuristic firing for a PDF link farm. One of the primary URLs, 'https://ttraff.ru/wix?keyword=dfo+guild+dungeon', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended malicious destination. The presence of numerous other links, many pointing to Shopify, indicates a likely SEO spam or phishing attempt.

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/wix?keyword=dfo+guild+dungeon
    • https://cdn.shopify.com/s/files/1/0435/3576/1562/files/26714656827.pdf
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/oxford_discover_grammar_3.pdf
    • https://cdn.shopify.com/s/files/1/0437/2866/6785/files/present_perfect_since_for_already_yet.pdf
    • https://cdn.shopify.com/s/files/1/0438/9116/3291/files/fitness_tracker_app_android_free.pdf
    • https://static.usrfiles.com/ugd/5ecadc_075dc3a589b64f66a895260d56faf5f7.pdf
    • https://static.usrfiles.com/ugd/4d400c_257c8882e9734b9c982dd06f0c26ce60.pdf
    • https://static.usrfiles.com/ugd/c7a620_0189ad5403f94fde8c15d0ffac6b5b25.pdf
    • https://static.usrfiles.com/ugd/ecec20_de6c163bc9f24376aedc61f80bd5e7e4.pdf
    • https://static.usrfiles.com/ugd/6da380_5346eb0dc1bf422a89f9e32fed636de5.pdf
    • https://static.usrfiles.com/ugd/2c8d66_4c014d8399964d53a6996b77a3d4c32b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8c2e267e4b74361af773f31ab0b98db.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_8412ea7d16a449a7b23382ca382460bd.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/jikokameronowibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/refedalake.pdf
    • https://cdn.shopify.com/s/files/1/0462/7261/0464/files/zombie_shooting_game_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/ge_profile_arctica_refrigerators.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/adobe_photoshop_cs5_1_brushes.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_off00004e29.bin
5f083f94a63e2513c7eae7f0b54550a0164538bb59feefb61a09616bbd223385
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E29 4592 bytes
font_01_sfnt_off00005de6.bin
3efe02e96f33810635e3e4475faacbe55de1c3bd5452962863383e2b660411fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE6 10144 bytes