Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e04c84556a9213…

MALICIOUS

PDF

44.4 KB Created: 2020-08-17 14:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eead451b81c3d48cf785f467a633a6d2 SHA-1: adde88bc6626e7940108a71282ea45d614df0105 SHA-256: d0e04c84556a9213713f3d8d83c35bb49d6bbc7c11a527712aeecca67d2b3a88
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=big+fish+game+app', suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content. No scripts were extracted, but the primary attack vector appears to be the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=big+fish+game+app
    • http://files.summerraechase.com/uploads/1/3/0/8/130813855/af63dc7714aa.pdf
    • http://files.meinradrottweilers.com.au/uploads/1/3/1/4/131407796/4141642.pdf
    • http://files.valleygraceevents.net/uploads/1/3/1/3/131378993/dufojemudu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/46872199974.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/90726495542.pdf
    • https://cdn.shopify.com/s/files/1/0434/1327/4780/files/fijawavi.pdf
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/45140349245.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/bit_by_bit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71135401618.pdf
    • https://cdn.shopify.com/s/files/1/0440/0241/0654/files/cookie_clicker_building_cost_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/array_of_colours.pdf
    • https://cdn.shopify.com/s/files/1/0439/0046/9403/files/wofuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/8446104366.pdf
    • https://cdn.shopify.com/s/files/1/0432/3475/4728/files/voberaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7936/files/93130196929.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
font_00_sfnt_off00006379.bin
4406df4ea88e4411fc7abf65a84d8c1ca2e52f30c81c5aea5a1705a1d2b54942		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6379 4728 bytes
font_01_sfnt_off0000738a.bin
0e7c9cbc484855048d983effdc6672216c833bcdbe2214437144e44d6cb9a616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738A 10364 bytes
font_02_sfnt_off00009701.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9701 4324 bytes

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