Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1f9b3504c9d88c…

MALICIOUS

PDF

38.3 KB Authoring application: QPDF
MD5: 272a1f79e640f63a72e0d13b4df49b35 SHA-1: 59aaa8c8a4fca51c5d563d647506ca0803e868cc SHA-256: cd1f9b3504c9d88cb8900d391c9d470df5d1c3e77218e7fed7081c386160fdc6
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, indicating a link farm or redirection mechanism. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly suggest a phishing or traffic-generation scheme. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the structure and URL distribution are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://draasman.com/uploads/1/3/0/2/130274109/08c80cc1e.pdf
    • http://thebottomgreenline.org/uploads/1/3/0/6/130605089/5f607581e60c.pdf
    • http://catawbapress.com/uploads/1/3/0/7/130738706/aff619afe584adb.pdf
    • http://bytheblade.shop/uploads/1/3/0/3/130313434/meralesap.pdf
    • http://peterpetschenig.com/uploads/1/3/0/5/130588954/dekuzimedujega_tezew.pdf
    • http://infinitivetrustshop.com/uploads/1/3/0/2/130270887/gajanamemikunod.pdf
    • http://atbutterworth.com/uploads/1/3/0/2/130291910/nusenavigirum_mobojo.pdf
    • http://thisisinnovation.com/uploads/1/3/0/8/130814874/siwuditewi.pdf
    • http://californiasreglazing.com/uploads/1/3/0/7/130776316/58c4acf63b9.pdf
    • http://deanareiboldt.com/uploads/1/3/0/6/130639982/dc2089e99e.pdf
    • http://storgaardsparken.com/uploads/1/3/0/5/130547576/5858776.pdf
    • http://maribethshillsdale.com/uploads/1/3/0/6/130605190/7006571.pdf
    • http://akakeb.com/uploads/1/3/0/3/130313022/9456913.pdf
    • http://c0118146xstreamtravel.xsideas.com/uploads/1/3/0/6/130621022/130621022.html#free+printable+very+hungry+caterpillar+coloring+pages

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003cce.bin
1fb394a189f6ba96a18c4ed619f63ba08b6f246f33491f7430ce53d927342ba9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3CCE 8056 bytes

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