Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6b291040f5b3bc…

MALICIOUS

PDF

59.9 KB Created: 2020-08-11 08:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5db59868ad49db801c3fd887057916e SHA-1: 58c489d9961e7e9d6a3ded510fe54af3a221021d SHA-256: bc6b291040f5b3bc8c7470d30fe2fbf6fc1553d7f1b4e473a651bd0df4b1425a
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=seoul+metro+map+pdf+download'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure for a fake download. The presence of numerous other links, many hosted on Shopify, further supports the SEO link farm heuristic, indicating an attempt to manipulate search results for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=seoul+metro+map+pdf+download
    • http://files.themechatroniclibrary.com/uploads/1/3/1/3/131379594/c9bd62.pdf
    • http://files.atouchofmeme.com/uploads/1/3/0/8/130813526/68540f6e7ab16d.pdf
    • http://files.valleyliberator.com/uploads/1/3/1/6/131606035/padavosagog.pdf
    • http://files.wholeheartedlyforever.com/uploads/1/3/1/3/131381555/6502965.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21511039237.pdf
    • https://cdn.shopify.com/s/files/1/0439/3009/1688/files/affective_neuroscience_panksepp.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/jeriwerilibitabarumizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3489/3718/files/playstation_vue_error_5011.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9126/files/99076795661.pdf
    • https://cdn.shopify.com/s/files/1/0437/5861/6733/files/77069171205.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/fakuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/5147/3303/files/jidipezogujabuzinepa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/dexoxelufikabukofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/86860668918.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2633/files/credit_card_application.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/85573055118.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006416.bin
6f6c5a8fb5e62cfd2b6ff76f758e0f05a98695d5bac735cd019a42cb5e5649ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6416 2952 bytes
font_01_sfnt_off00006ea3.bin
c94c414983d30a011a3ef42466acf3d74d66b290a5e45053b68256125e7a3277		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA3 5204 bytes
font_02_sfnt_off0000804a.bin
5ea255a0be306c964ef11b9cbdc42a826567569a67922cd2e245e35186e700dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804A 13384 bytes
font_03_sfnt_off0000a889.bin
53ca975a28b7c2357a4b89254313ec6a4cee795c0678303e9051325c0fb3fe4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA889 10396 bytes
font_04_sfnt_off0000cc46.bin
e43cab62505f54e4760bf272cab93e766eb33bdd515bdab7eabef2abffd53bc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC46 16252 bytes

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