Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e6ef3c8ed8f879…

MALICIOUS

PDF

29.6 KB Authoring application: Poppler-utils
MD5: ab8c66e2cb035b8ce58081d1932e6180 SHA-1: fdb77d99dca5fe88df1e7491596172d29ab85d3e SHA-256: 42e6ef3c8ed8f879a447a4c106053375992f7b52728f75e7357eb59b5bf477fa
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule and ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0. The embedded content reveals a large number of external PDF links, many of which are hosted on suspicious domains. This strongly suggests a phishing or malware distribution campaign, where the document itself serves as a lure to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://2017chessietrailfallhalfmarathon5k.com/uploads/1/3/0/6/130621446/3514226.pdf
    • http://antivirusguardingservice.xyz/uploads/2020/01/28/2406017.pdf
    • http://worksafehsesolutions.com/uploads/1/3/0/6/130620551/1dd06c7be8ab748.pdf
    • https://tijomodu.weebly.com/uploads/1/3/0/3/130379105/af27f9297.pdf
    • http://diseg.tiadasempanadas.com/uploads/2020/01/29/091c1f665a33.pdf
    • http://luparev.onwood.su/uploads/2020/01/28/jisejox.pdf
    • http://ninternet.com/uploads/1/3/0/5/130590663/wuwobo.pdf
    • http://letterdetectives.com/uploads/1/3/0/5/130550953/f6684039a0.pdf
    • http://wagonerchurchofchrist.weebly.com/uploads/1/3/0/2/130272286/woridemagoba.pdf
    • http://berkouwer.weebly.com/uploads/1/3/0/4/130435581/cabeac.pdf
    • http://100percentcajun.com/uploads/1/3/0/6/130621870/juweluvikijukagagos.pdf
    • http://betutowi.makemone.su/uploads/2020/01/28/1229608.pdf
    • http://ruroxed.iholpworld.com/uploads/2020/01/28/b50324e1344fa.pdf
    • http://officialbluehangers.com/uploads/1/3/0/2/130289733/sibaxuwi.pdf
    • http://raweva.tehnika-asko.ru/uploads/2020/01/28/zuvenupinumenemanesi.pdf
    • http://somersetfoodtrail.org/uploads/1/3/0/5/130538838/130538838.html#proving+overlapping+triangles+congruent+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001389.bin
db91c7b77716732e36129cd57c9ff45a16c90a6eb14fd2e15f18cc82e89045c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1389 6776 bytes

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