Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fe853a479e6173…

MALICIOUS

PDF

38.3 KB Authoring application: Inkscape
MD5: fd7f1cfe836db9b7ecb88cdb9666aaf4 SHA-1: bbab4494524ea6094c3153abced2b770087b7f60 SHA-256: 42fe853a479e61732573138722bd4801c1ef1ff9bc4cee2aa46ad922cec19df4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF files, a technique commonly used for SEO poisoning and distributing malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the critical heuristic 'PDF_SEO_LINK_FARM' strongly indicate a phishing or malware distribution campaign. The embedded URLs are the primary indicators of compromise, likely leading to further malicious payloads.

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://tifoterawu.sushi-v-noginske.ru/uploads/2020/01/28/7158119.pdf
    • http://nepservicesinc.com/uploads/1/3/0/4/130436492/81969f42d.pdf
    • http://artpassion.store/uploads/1/3/0/6/130604113/masagutasatoj_nejikapalo.pdf
    • http://nicequotes.net/uploads/1/3/0/3/130379051/robumujopo_vegagovumenapi.pdf
    • http://alphritasims.com/uploads/1/3/0/6/130620788/33ff51f87c.pdf
    • http://nestnewhomes.com/uploads/1/3/0/6/130604702/pumegimi.pdf
    • http://oakclass.com/uploads/1/3/0/5/130543653/130543653.html#maps+of+oakland+county+michigan

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010d2.bin
b16f5e9fd8e86534c695b408aaea5917229446d85eaecf88f95ad13cf975db48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2 7956 bytes

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