Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcafb0eeacb5e4d4…

MALICIOUS

PDF

48.0 KB Authoring application: Nitro PDF First seen: 2020-09-24
MD5: 8368a5693a4e0af87ce4c8086fede7ff SHA-1: bf754633b5037e63e5f1381cfc17dbf1f6eabe6e SHA-256: bcafb0eeacb5e4d447c56817ff380d1cec5611ce42db845708c04767e4b836a4
192 Risk Score

Malware Insights

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

The PDF file was detected as malware by ClamAV, specifically 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. Static analysis revealed a large number of embedded external links, indicating a link farm designed to redirect users to potentially malicious content. The primary attack pattern involves leveraging these links for phishing or malware delivery.

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://retroproskc.com/uploads/1/3/0/4/130488820/1143208.pdf In PDF document text
    • http://cureand.com/uploads/1/3/0/5/130538817/de8f3ac3.pdfIn PDF document text
    • http://www.dhampirproductions.com/uploads/1/3/0/3/130313320/3f36ec1ba2d9.pdfIn PDF document text
    • http://merwininsurance.net/uploads/1/3/0/2/130272932/0cd014d.pdfIn PDF document text
    • http://omcr.org/uploads/1/3/0/6/130604968/lalumipivuxufil.pdfIn PDF document text
    • http://mta-sts.mail.indimex.mx/uploads/1/3/0/4/130476462/rudesuxenotarukoviru.pdfIn PDF document text
    • http://ncplbasketball.org/uploads/1/3/0/7/130774972/1400510.pdfIn PDF document text
    • http://www.thomasvillept.com/uploads/1/3/0/6/130620677/zadapodubu_kilajewap_puvavironofu.pdfIn PDF document text
    • http://hostmaster.hotrealestate.com/uploads/1/3/0/5/130589102/pigika_zobemag_tetoje.pdfIn PDF document text
    • http://hostmaster.slamrecoverycollege.co.uk/uploads/1/3/0/6/130604499/pisigalolado-madotimololeg-pulilamuwasudan.pdfIn PDF document text
    • http://chargeteck.com/uploads/1/3/0/7/130775701/liwiridav.pdfIn PDF document text
    • http://tops11s.com/uploads/1/3/0/5/130589150/julige.pdfIn PDF document text
    • http://merakidestinationmanagement.com/uploads/1/3/0/2/130272610/lizibatu.pdfIn PDF document text
    • http://www.perthkitchendoorreplacement.com.au/uploads/1/3/0/7/130775521/dc484db4bbb1c1f.pdfIn PDF document text
    • http://youarethebestyou.com/uploads/1/3/0/2/130289763/fewuxosexarok.pdfIn PDF document text
    • http://barriebasketball.com/uploads/1/3/0/3/130323216/bd8be69872a7b6c.pdfIn PDF document text
    • http://reifierentertainmentdevelopment.com/uploads/1/3/0/7/130775497/2719008.pdfIn PDF document text
    • http://chinacrocodile.com/uploads/1/3/0/2/130289504/6107136.pdfIn PDF document text
    • http://thescottnoe.com/uploads/1/3/0/5/130543667/wajifagad-puxozu-vujuj-biteti.pdfIn PDF document text
    • http://adsl-63-204-18-2.benefitplans.org/uploads/1/3/0/7/130739093/130739093.html#pathology+myocardial+infarction+pptIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off00004d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D78 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
font_01_sfnt_off000059c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59C0 9080 bytes
SHA-256: a4d1e5d78fe437bc1dd163c55e1f541bfc33623f324885d2752ff44cff415847

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