Malicious PDF — malware analysis report

Static analysis result for SHA-256 03af7b8c0958c2c8…

MALICIOUS

PDF

41.4 KB Created: 2020-08-21 01:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6f360d2805e0e72cbcf16ce286417b2 SHA-1: 15cfb89621fc7e4ad1343dd44b17663113b64f71 SHA-256: 03af7b8c0958c2c815d146c84c7549993a049c17bf5fe1ff0a3fc5c4048d988a
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 external PDF files hosted on Shopify and other domains. One of these links, 'https://ttraff.com/pify?keyword=bomb+it+kart+racer++pc', is identified as a malicious redirector. The presence of a link farm suggests an attempt to obscure malicious intent or to leverage SEO techniques for distribution. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the exact lure.

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=bomb+it+kart+racer++pc
    • http://xorufa.ohmygreyhounds.com/uploads/1/3/1/3/131383791/38e1a262ad8.pdf
    • http://rurem.threesisterstudio.com/uploads/1/3/0/7/130739693/1521565.pdf
    • http://lafokoto.uehl.ca/uploads/1/3/1/4/131412032/1319059.pdf
    • http://remavevan.en.skandiaorgeln.com/uploads/1/3/1/4/131438304/besasuso.pdf
    • http://files.cbuhrlaw.com/uploads/1/3/2/6/132695574/vawoguneriz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/malayalam_calendar_2020_mathrubhumi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9602/3975/files/carbomastic_15_lt_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/17771752042.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/kunegejixixuvurit.pdf
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/fuleludivubaziwavofa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/14092127812.pdf
    • https://cdn.shopify.com/s/files/1/0429/2031/2991/files/48396870535.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7287/files/87242740358.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/dipinu.pdf
    • https://cdn.shopify.com/s/files/1/0450/8853/8776/files/the_old_man_and_the_sea_drive.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/xumobevuritotujujotej.pdf
    • https://cdn.shopify.com/s/files/1/0434/8516/7766/files/30773912462.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/81327432635.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044b7.bin
d90e47bae2189242ed7fce7ec71aaea02178907d3e3ca0b4978634d710f0e046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44B7 4804 bytes
font_01_sfnt_off00005505.bin
2547df0c9953a5e555d1521bac12f47912a43c661d2a105b3acdcba0d4121be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5505 9416 bytes
font_02_sfnt_off0000755e.bin
3afbc95f4a2677bf4c8b77bd7df62e4dbeb651db4b5e482cf97b58e472170d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755E 16164 bytes
font_03_sfnt_off00008a57.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A57 4324 bytes

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