Malicious PDF — malware analysis report

Static analysis result for SHA-256 a304b4dda553b55b…

MALICIOUS

PDF

65.3 KB Authoring application: GIMP
MD5: 3dc3bc868e993f1435608e6b486adfbe SHA-1: 3ef0f6bceabc9ed879c13d8303fc7e52e0831fba SHA-256: a304b4dda553b55bfda1e2d5033e7ff3c52ee5453a029eec3141000f9b29d90d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF contains a large number of embedded links to external PDF files hosted on various domains, indicative of a link farm or phishing campaign. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. The document body content is heavily obfuscated and appears to be corrupted, but the presence of URLs within it confirms the malicious intent.

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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 http://jani.sardelas.ru/uploads/2020/01/28/810c895a5d25f11.pdf
    • http://jimiram.lucky-game.online/uploads/2020/01/28/6058823.pdf
    • http://victoriafacella.com/uploads/1/3/0/2/130289229/8f1475741a7097a.pdf
    • http://travelatyourleisure.com/uploads/1/3/0/6/130604203/1431887.pdf
    • http://favojave.vpalatke.pro/uploads/2020/01/28/c40986ce2aedae5.pdf
    • http://modish716.com/uploads/1/3/0/2/130273589/mapew_komiretu_gemogo.pdf
    • http://livameti.artmexicano.online/uploads/2020/01/28/fikusimax.pdf
    • http://xiruzur.nhatminhphoto.online/uploads/2020/01/27/03550b128.pdf
    • http://kixep.paytosite.icu/uploads/2020/01/27/7723376.pdf
    • https://wagefelom.weebly.com/uploads/1/3/0/2/130287971/falomivulumaj.pdf
    • http://evokefitness.net/uploads/1/3/0/2/130272414/130272414.html#drive+drive+drive+ps4+trophy+guide

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014b5.bin
9b10c99e2c462f110abe7e1cf140bcaef485f420dcfee39e21a009ef90d67830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5 9228 bytes
font_01_sfnt_off0000ba34.bin
b32191d6dac1903e3ec139b3e91a40f13938de3dcb588c278e0c60d9389fdf24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA34 16096 bytes

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