Malicious PDF — malware analysis report

Static analysis result for SHA-256 55052395a5c3f234…

MALICIOUS

PDF

44.4 KB Authoring application: GIMP
MD5: 0bba0df68ece310b12c65095325e7ede SHA-1: 990902dad3b7e61fa17c3738eb9ca167511f1235 SHA-256: 55052395a5c3f234dc622d46b5dd94ad15d86af899bf75f670d201ee4c43aef4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Pse 2018 football game' and lists numerous URLs, reinforcing the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://vitaminbongda.weebly.com/uploads/1/3/0/6/130621280/xetodurakinaruxobuk.pdf
    • https://zafojewun.weebly.com/uploads/1/3/0/2/130289558/7952372.pdf
    • http://riromasavu.pizzascaseras.org/uploads/2020/01/28/jawosewo.pdf
    • http://rockofagesbiblecamp.com/uploads/1/3/0/5/130541817/3856572.pdf
    • http://notalright.org/uploads/1/3/0/6/130621349/tedurobosozonaf-nipaxupax.pdf
    • http://rachkonline.com/uploads/1/3/0/6/130604892/5172856.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/2/130289669/130289669.html#pse+2018+football+game

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000059f0.bin
255d2ed7612908235d6c240be3384de3c8d9d33535584ecf14fc770ef2a5d2fc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x59F0 21284 bytes
font_00_sfnt_off00001145.bin
cef832badee918c8cbeb370c5a49010c0a7766bed57ca0d42672572c2f9ae3f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1145 8216 bytes

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