Malicious PDF — malware analysis report

Static analysis result for SHA-256 e279d895709f3e5f…

MALICIOUS

PDF

39.2 KB Created: 2020-08-14 21:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ba825e6782bba1d008657a14208e489 SHA-1: 4605d7cf6b9414f1b9214d2a7b6230b755cbc1c1 SHA-256: e279d895709f3e5febd3ac3a6c0e4fe3a1de4ec61efb89176bf988f008606d3d
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to sheet music. The primary malicious link is https://ttraff.cc/wb?keyword=grazing%20in%20the%20grass%20sheet%20music%20pdf, which likely leads to a phishing or malware distribution site. The presence of a link farm heuristic further supports the malicious intent of distributing traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://ttraff.cc/wb?keyword=grazing%20in%20the%20grass%20sheet%20music%20pdf
    • http://files.crystalmorsegolf.com/uploads/1/3/1/4/131453645/fd0306c111798.pdf
    • http://pepet.urbannashville.com/uploads/1/3/0/8/130874493/1745767.pdf
    • http://kapumud.makomath.com/uploads/1/3/2/3/132302815/mejupabefipudadul.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/catzos_blancos.pdf
    • https://cdn.shopify.com/s/files/1/0437/3485/9941/files/73065183214.pdf
    • https://cdn.shopify.com/s/files/1/0428/5536/6822/files/achilles_story.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/firexuludak.pdf
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/4881246132.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/zotumavepovuzumexadenijif.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/no_gba_zoomer.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/kumeka.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/74752583684.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a42.bin
5715bcb89acb4567b998ba1ededb666760b5b81ca0d9e2aa83dc16af0c15646b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A42 5616 bytes
font_01_sfnt_off00006d39.bin
bc526a651f834d7180d438c0748c3abc52a1aac0392e20a85bd3edf901b7f521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D39 10304 bytes

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