Malicious PDF — malware analysis report

Static analysis result for SHA-256 d521b7137d580fbf…

MALICIOUS

PDF

43.6 KB Created: 2020-08-17 16:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a628db501d6f627d0490ad19085217c5 SHA-1: ed35676c495793f6511ba849bdfa41cf5b4e4842 SHA-256: d521b7137d580fbf18bf175895aa5b214db3e45557890d5de0144a4c1ecc0d9a
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Photoshop free old version' and the authoring application, suggesting a lure for software downloads. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site, likely for malware distribution or phishing.

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.com/pify?keyword=photoshop+free+old+version
    • http://jarovuni.2020idocs.com/uploads/1/3/1/4/131437736/3527469.pdf
    • http://files.moveparkourdocumentary.com/uploads/1/3/0/7/130739315/ligen_kaxodowuvigumi_lisudenamu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/bullwhip_days.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/29827895299.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/93279087001.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/apc_back_ups_pro_1000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/shortcut_formula_of_maths_for_competitive_exams.pdf
    • https://cdn.shopify.com/s/files/1/0432/4383/1464/files/25058556117.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/72328191765.pdf
    • https://cdn.shopify.com/s/files/1/0436/7217/4745/files/fosagowiden.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/fidic_yellow_book_guide.pdf
    • https://cdn.shopify.com/s/files/1/0447/8281/3341/files/36138807120.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/93474950489.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_off000056a9.bin
e2c690c5e6dd70c4bbd941f1f5b3fc85d75a92dde86538f532cfe2aa9856235a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A9 4768 bytes
font_01_sfnt_off000066d6.bin
35c19859fc5d05f929ed280756fc171bbef4ed81b1d7111678d49aa7cf79f5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D6 13724 bytes
font_02_sfnt_off000091b8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91B8 4324 bytes

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