Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efff950c6400bdf…

MALICIOUS

PDF

44.9 KB Created: 2020-08-22 14:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ff547f620c189af5f6b4d52c054841c SHA-1: f86b712c3fc95a20b029f24cd0d64133dd77c26a SHA-256: 6efff950c6400bdfa309cad4088d42c902e84b5305bd9778b3407102d5579e7b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, many of which point to what appears to be a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.ru/pify?keyword=betflag+poker+apk', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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=betflag+poker+apk
    • http://files.g7evenphotography.com/uploads/1/3/0/8/130814258/jivuxupaxusulan-girakajefuzopet-lulojukegik.pdf
    • http://jefuzuz.midlandsmortgages.co.uk/uploads/1/3/1/6/131606758/petasoputefom.pdf
    • http://leragidex.sheldonoil.com/uploads/1/3/1/3/131383657/3461612.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pelezegagujagemubejapo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/73_dodge_challenger.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/nusokosuvonilet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/3426395403.pdf
    • https://cdn.shopify.com/s/files/1/0435/5670/0319/files/constructivism_in_mathematics_education.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejut.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/ronawawoso.pdf
    • https://cdn.shopify.com/s/files/1/0439/3294/2504/files/box_cars_and_one_eyed_jacks.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/76654269857.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/33111059543.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cbe.bin
5acf26a927d94636226099cd0c9b6080cc34de0bb1604f419f4beb2d786915ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBE 5004 bytes
font_01_sfnt_off00006dd9.bin
a98d5662e3e20c85933878ae9202358b8f8e801cb63caf6dbf74acebf3cb5f7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD9 10640 bytes
font_02_sfnt_off0000926b.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x926B 16036 bytes

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