Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a12f20213b9e8bd…

MALICIOUS

PDF

43.5 KB Authoring application: Nitro PDF
MD5: 90d16c4e0b06c0509874631d485eeff8 SHA-1: df0828aa1b3311479187f1e1a9926b8956c03915 SHA-256: 4a12f20213b9e8bd478ce6279e4a1b4309e39cdb44fd7da4cbfda22c0c6be662
120 Risk Score

Malware Insights

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

The PDF file was detected by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0. Static analysis revealed a large number of embedded links to external PDF files, indicating a link farm likely used for SEO manipulation or to distribute malicious content. The document body mentions 'Subestacion electrica dwg' which appears to be a lure to attract users interested in technical drawings.

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://steelcityselectsoftball.com/uploads/1/3/0/2/130272443/a85916b5.pdf
    • http://cityonloc.com/uploads/1/3/0/2/130288534/6aed1a62efb8b.pdf
    • http://cruxportal.com/uploads/1/3/0/6/130605219/630227750af.pdf
    • http://meg.bizsphere.ru/uploads/2020/01/28/vasanuvepixoxafoxe.pdf
    • http://crimsonshadowpack.com/uploads/1/3/0/6/130603838/ecb323a12a6159e.pdf
    • http://mohousing.weebly.com/uploads/1/3/0/5/130590168/zidojep-rajajus.pdf
    • http://americalibertyforum.com/uploads/1/3/0/6/130620402/8960211.pdf
    • http://birdhousepdx.com/uploads/1/3/0/6/130621446/vizefe.pdf
    • http://captcush.com/uploads/1/3/0/4/130476403/jevamode_tokun.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/6/130639889/130639889.html#subestacion+electrica+dwg

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001260.bin
ae6ec90c8f1e7a78f66213e359f5bcc9242c929d63548f2142cf7eaa6dc6024b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1260 9548 bytes

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