Malicious PDF — malware analysis report

Static analysis result for SHA-256 41886f2c5151f96e…

MALICIOUS

PDF

43.7 KB Authoring application: PDF Studio First seen: 2020-09-04
MD5: 6c5dff95998a661952f4314c9da032d8 SHA-1: b3e59260ba511dd969420b8dfa86ae7778daf7fd SHA-256: 41886f2c5151f96e6d548d8462742f37747d210d44e298dbae6cf139d37f7c21
192 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links pointing to other PDF files across various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a malicious classification. No scripts were extracted from this sample, and the document body content was heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://www.mychoice-thefilm.com/uploads/1/3/0/5/130589429/dadijasafelixi.pdf In PDF document text
    • http://nebraskansunitedforthegoodlife.net/uploads/1/3/0/8/130874278/6944225.pdfIn PDF document text
    • http://www.theruffugees.org/uploads/1/3/0/6/130621997/didifafarot.pdfIn PDF document text
    • http://shopbykddesigns.com/uploads/1/3/0/6/130639246/6e644fd339.pdfIn PDF document text
    • http://tuyyophotography.com/uploads/1/3/0/8/130814830/ee55bfa.pdfIn PDF document text
    • http://mynumbereddays.online/uploads/1/3/0/6/130604539/b2a00247c.pdfIn PDF document text
    • http://bentworthcommunitycenter.com/uploads/1/3/0/2/130274267/tixuk_movomonarepi.pdfIn PDF document text
    • http://www.coachsmith.net/uploads/1/3/0/7/130740086/fovete.pdfIn PDF document text
    • http://exocognitive.com/uploads/1/3/0/5/130590122/sesekibidimeka.pdfIn PDF document text
    • http://yonatan77.octarinesec.com/uploads/1/3/0/6/130605443/b3a94920.pdfIn PDF document text
    • http://orbitfiction.net/uploads/1/3/0/2/130288321/gubagibirudovet.pdfIn PDF document text
    • http://www.thegrowingseedsoflove.org/uploads/1/3/0/6/130604986/303fc2bb116e.pdfIn PDF document text
    • http://orderyourbluebook.com/uploads/1/3/0/6/130639283/b83ae55.pdfIn PDF document text
    • http://girlfact.com/uploads/1/3/0/6/130621003/fufigomuwusiwetaxof.pdfIn PDF document text
    • http://spctermites.com/uploads/1/3/0/4/130436271/1721205.pdfIn PDF document text
    • http://wondertraveltours.xsideas.com/uploads/1/3/0/7/130775197/130775197.html#how+does+thermos+flask+prevent+transfer+of+heat+by+conduction+convection+and+radiationIn 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_off00004302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4302 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04
font_01_sfnt_off00004ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF4 8352 bytes
SHA-256: fa322ae55af914e57e04a4d777e9f1300699f28525c0f0fda9da2c77062ec0dd

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