Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d8bd60eeba1b84…

MALICIOUS

PDF

81.9 KB Authoring application: Pdftk First seen: 2020-09-24
MD5: 81a259460aa893ad66174f1c03eb8af3 SHA-1: 9683c6e7780d7f9579b82b7522b1f4eb126e2c68 SHA-256: b9d8bd60eeba1b847a73d512ffa627978ad9492d223185c52bfa950d36f152be
192 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF files, a technique commonly used for SEO poisoning and distributing malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into believing they are owed money or a prize, which is a common lure for advance-fee fraud. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further confirms its malicious nature. The primary attack pattern involves redirecting the user through these links, likely to a site that will download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://stresswiseatwork.com/uploads/1/3/0/5/130545128/xosotijak.pdf In PDF document text
    • http://avneetbansal.com/uploads/1/3/0/6/130639785/populuvesikumob.pdfIn PDF document text
    • http://www.61rumors.com/uploads/1/3/0/8/130813489/6210188.pdfIn PDF document text
    • http://koreanchurchofmemphis.org/uploads/1/3/0/7/130740086/rajafodajabo-veviji-setizifiren-xivitebu.pdfIn PDF document text
    • http://popcornremovalaustin.com/uploads/1/3/0/2/130272432/0a36a5b.pdfIn PDF document text
    • http://heloisecrista.com/uploads/1/3/0/3/130313698/pimamevom.pdfIn PDF document text
    • http://surfcitydelivery.org/uploads/1/3/0/3/130379864/sagamutafowolam.pdfIn PDF document text
    • http://johnsiecagle.com/uploads/1/3/0/8/130814601/5587124.pdfIn PDF document text
    • http://groupejobinassurances.com/uploads/1/3/0/6/130604692/luvodakaviv.pdfIn PDF document text
    • http://magicalspincasino.org/uploads/1/3/0/2/130292013/b09ea04ed98e58b.pdfIn PDF document text
    • http://dasbilower.space/uploads/1/3/0/4/130435914/buraxezuzaxofaxutumu.pdfIn PDF document text
    • http://mhernandez.org/uploads/1/3/0/5/130590507/fiperugitaro_fikurazodilol_gulomofekado_waguwo.pdfIn PDF document text
    • http://nikkimichelleandthecosmiccollectivemusic.com/uploads/1/3/0/7/130775672/3bfc8f70f0c.pdfIn PDF document text
    • http://calyculin.com/uploads/1/3/0/5/130588751/ponusasegorilepulo.pdfIn PDF document text
    • http://bonniejohnston.com/uploads/1/3/0/5/130543025/fotoderedek.pdfIn PDF document text
    • http://tireshopphoenix.pro/uploads/1/3/0/7/130739084/wijogup.pdfIn PDF document text
    • http://glendalemenssuit.com/uploads/1/3/0/6/130605075/lenixojadewewesomefa.pdfIn PDF document text
    • http://myorthomd.net/uploads/1/3/0/6/130605041/5c3633e2de.pdfIn PDF document text
    • http://johnsonandsonsservices.com/uploads/1/3/0/5/130551836/130551836.html#principal+agency+theory+pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CD5 9412 bytes
SHA-256: b7fd734dc0337265fd06dd65fd70db2aee2e922857c3d0851bc37b80348b2d74
font_01_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 16060 bytes
SHA-256: b080e6aa9682ff87567a230b404ab00780bafcfd3ba11e3f536b788ca6e08ef5

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