Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce71e43fd4fab3b1…

MALICIOUS

PDF

44.5 KB Authoring application: QPDF First seen: 2020-09-24
MD5: ddfb8492ca2e444a218ac44d8b7bc26f SHA-1: 3c35fe9da1693e7c6761cb3632f0a5edcb98d75b SHA-256: ce71e43fd4fab3b1e0fb45af70fbc0cb824fec6781863be8a6e06c339e649dc6
192 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded URLs point to various domains, suggesting a coordinated effort to redirect users. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or malicious redirection intent. The document body, though heavily obfuscated, contains some of the linked URLs.

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://unspoiledpodcasts.com/uploads/1/3/0/5/130539442/2710157.pdf In PDF document text
    • http://natgilbert.com/uploads/1/3/0/3/130313453/4a0d8e23e2.pdfIn PDF document text
    • http://v-aria.com/uploads/1/3/0/2/130289549/1651368.pdfIn PDF document text
    • http://davidsonthecorner.com/uploads/1/3/0/4/130476468/ada5a48f05f1a.pdfIn PDF document text
    • http://wd-consult.com/uploads/1/3/0/5/130551971/jixijalema-gedumopapasiv.pdfIn PDF document text
    • http://antiviruseprotectserviceonline.site/uploads/1/3/0/6/130604429/130604429.html#ipek+ongun+kendi+ayaklar%C4%B1+%C3%BCst%C3%BCndeIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 1

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_off0000129d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D 9972 bytes
SHA-256: 58bca37644748837615812b1438464b2ef046af448346774f3860cfd6905e3e3
font_01_sfnt_off00005f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F00 19348 bytes
SHA-256: 2b8133f06c36e892db3eaad1ca9d7672f36c940eae8c56236338a90c5f48ad55

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