Malicious PDF — malware analysis report

Static analysis result for SHA-256 044e5866f6b07900…

MALICIOUS

PDF

35.8 KB Authoring application: Mobipocket Creator
MD5: 074631fd86b7febc8b3661cf5351d1c6 SHA-1: 516bf4ae1323997cb10cca7e8a6718d1d4fa3fcc SHA-256: 044e5866f6b07900bc68481d5751db41dc3e184e34ed89a66ef2c420b7d9b677
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files across various domains, indicating a link farm or redirection scheme. This behavior is consistent with SEO manipulation or a method to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://arikarapson.com/uploads/1/3/0/5/130550760/3130972.pdf
    • http://freespiritslongisland.com/uploads/1/3/0/5/130550684/4a7545a1.pdf
    • http://pulquetour.com/uploads/1/3/0/2/130273761/2269811.pdf
    • http://metlifelostpensions.com/uploads/1/3/0/6/130605285/6652106.pdf
    • http://drsba.org/uploads/1/3/0/4/130435914/mifafuwa_vigajamijupit_samofir_jajawopevazepe.pdf
    • http://beyondcleanmaids.ca/uploads/1/3/0/2/130274098/zitar.pdf
    • http://dgomola.weebly.com/uploads/1/3/0/4/130476778/d5945bbb.pdf
    • http://sunsetridgeatlanesend.ca/uploads/1/3/0/2/130287239/9138883.pdf
    • http://meshayla.com/uploads/1/3/0/6/130621307/130621307.html#kansas+city+chiefs+laufen+zur%C3%BCck

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000120b.bin
57bc812c1194eaff927b72ee274c87cea80d2acb687b75d281c7c1e2cd9ceb9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120B 9668 bytes

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