Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b4c5cb3b9e72a6…

MALICIOUS

PDF

38.2 KB Authoring application: PDFBox First seen: 2020-09-24
MD5: 029dca20666bc871208451224aa0ee9e SHA-1: 52d6174d36714e682939e3cddac4287510144715 SHA-256: 88b4c5cb3b9e72a6a68eee0cf3eb7b7589ca95666f666262227486fd43d714de
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links to external PDF documents, a technique often used in SEO link farms to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier further indicate malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yournaturallybrightpatiocovers.com/uploads/1/3/0/5/130589250/550cefb127.pdf In PDF document text
    • http://pghyogacollective.org/uploads/1/3/0/3/130323293/b26631d6a604.pdfIn PDF document text
    • http://mywonderowl.com/uploads/1/3/0/4/130476940/2456471.pdfIn PDF document text
    • http://roadcraft-ds.com/uploads/1/3/0/4/130435581/03c9aa98ff8.pdfIn PDF document text
    • http://antiviruseprotectserviceonline.site/uploads/1/3/0/2/130271148/130271148.html#practical+application+of+meridian+style+acupunctureIn PDF document text

Related samples 5

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096 8432 bytes
SHA-256: 670bcad3a1195a28007a8d05a27d4c2e39352a0e6913281e38fa8a3203c5d8d2

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