Malicious PDF — malware analysis report

Static analysis result for SHA-256 040d3f41cddf9933…

MALICIOUS

PDF

61.7 KB Created: 2020-08-05 10:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6eccb7d1f97968e86ddb12fd54219259 SHA-1: c939a172384c5dca80c11b65cfcc80527dcc356a SHA-256: 040d3f41cddf99339c6f288a95bb2e61f99b75ec61392b8abbb19c8db64daf2c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service at 'ttraff.com'. This indicates a link farm or phishing attempt designed to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=bacterial+genome+sequencing+pdf
    • http://xanati.savethesmile.org/uploads/1/3/1/4/131453133/28254488239539.pdf
    • http://files.aokifooddreams.com/uploads/1/3/1/4/131410299/minol_tudivebu_sozefole_fupad.pdf
    • http://files.blairmielnikdesign.com/uploads/1/3/0/7/130739247/5e02b27.pdf
    • http://files.watchusgrowpreschool.com/uploads/1/3/1/3/131383943/tixun_dilagaleguwelu_tesafedevutujuk_vuduje.pdf
    • http://files.mikaeldavis.com/uploads/1/3/1/8/131856919/3022802.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0430/8585/6919/files/15360837314.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/33490455499.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/kosefunonalakanigujeko.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/17005044237.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/86085931984.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/zulirawanodafiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/1355/3827/files/zsh_command_not_found_npm.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/13995885727.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/69979266087.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1178/files/66213333539.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a40e.bin
e23f90a9500015e53d60f6fcc8f3b664d17d6e396c1964de53789fe1b6c16188		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA40E 5532 bytes
font_01_sfnt_off0000b6b7.bin
57adecf1066baac6c48adfa27e134fffcda791fd2cbef78db7f42a21a1cce754		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B7 10908 bytes
font_02_sfnt_off0000db4b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4B 4324 bytes

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