Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2872bed0872e8f2…

MALICIOUS

PDF

34.7 KB Authoring application: Pdftk
MD5: a93c5cd0494c27a2cb66534a70a55c15 SHA-1: 69615a8e91407f201e4907f4ccd4cecae1b02a20 SHA-256: c2872bed0872e8f2cfd0ee19481b865df4c6edaab4b266c7ae0b6697e843f258
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains a large number of embedded links pointing to external PDF files, a technique commonly used for SEO poisoning or phishing. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, while containing seemingly innocuous text about sprinkler systems, also embeds the malicious URLs, suggesting a lure to download further malicious content.

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://kojebe.lebosma.ru/uploads/2020/01/28/revupo-rafeforukokux-xugenonasos-fetuxu.pdf
    • http://morethansoulfood.net/uploads/1/3/0/4/130476447/jalegufowifedan.pdf
    • http://studyconnectnz.com/uploads/1/3/0/6/130605178/8d4ca0ac2f929.pdf
    • http://livingmetroeast.com/uploads/1/3/0/5/130589230/waxopete-vugokitovabal-zerigoxadij.pdf
    • http://nashvillemobilepetgrooming.com/uploads/1/3/0/6/130620751/4061093.pdf
    • http://baycitydance.com/uploads/1/3/0/6/130621814/6093230.pdf
    • http://sukudona.strongysha.xyz/uploads/2020/01/28/nekugakigofefe.pdf
    • http://newzealandcreativespacesstudioweebley.com/uploads/1/3/0/2/130287283/16fd1b03.pdf
    • http://spdcpa.ca/uploads/1/3/0/4/130483614/2826479.pdf
    • http://connectatc.org/uploads/1/3/0/4/130488476/rezinepusujiza.pdf
    • http://kelseyleonofficial.com/uploads/1/3/0/5/130588513/130588513.html#rain+bird+isa+304+error+codes

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012d8.bin
2912a797983cf1c5cdfc1a68375f7e4401c9ef5b56356b7742775b41b14f6170		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8 8512 bytes

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