Malicious PDF — malware analysis report

Static analysis result for SHA-256 092a8a617d7b76c6…

MALICIOUS

PDF

53.9 KB Created: 2020-08-09 03:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a7ec0113671007b6f50cbb4037c2c2c SHA-1: 9c83abbb74552b75ec238f1f3bc0a94b16c1318d SHA-256: 092a8a617d7b76c66c332d6314d1e8a18e6a3fc0e5fffb9dd1d134cf48d8569a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains references to PDF downloads and the redirector URL. The presence of numerous Shopify links, while many are benign, suggests an attempt to blend malicious links with legitimate-looking ones in a link farm strategy.

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.cc/pify?keyword=apostila+conhecimentos+gerais+e+atualidades+pdf+2020
    • http://files.legendarypg.com/uploads/1/3/1/1/131164118/1378340.pdf
    • http://files.stephaniecammarano.com/uploads/1/3/2/6/132681954/fovovip-fatotubek-zelilora-powexabejebopoz.pdf
    • http://files.allycole.com/uploads/1/3/0/8/130874120/ragufid.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/damegadunuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/99495542320.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/80162436145.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1185/files/minecraft_server_advertising_discord.pdf
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/17298717209.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/ciencias_forenses.pdf
    • https://cdn.shopify.com/s/files/1/0437/2273/5765/files/sony_vegas_pro_cracker.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/xusonuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/57472998460.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/80124194955.pdf
    • https://cdn.shopify.com/s/files/1/0430/8221/9674/files/gonelowovobaxozudedunufox.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_off00006a5c.bin
8500289966e8faac72fabc60d827ed9f73f8b4c37f47849a2a962a4d3b1543f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5C 5716 bytes
font_01_sfnt_off00007d95.bin
2ee62872f9e9432ac13fc6b7a37eeea38c858d2b51ac1d1244435961566ec1c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D95 12960 bytes
font_02_sfnt_off0000a4b0.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4B0 16204 bytes
font_03_sfnt_off0000b9dd.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DD 4324 bytes

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