Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd26d8861605aa93…

MALICIOUS

PDF

41.3 KB Created: 2020-08-22 05:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be89574d5555cea7480af536e9460c6f SHA-1: 19cd09a0160dbc4fe6daa0e6a6b3ca0e6cc5814b SHA-256: bd26d8861605aa9341fa81a69ff0fc42ea4291c34fa00174ede7f786341ad8d0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=worship+sheet+music+free'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or content-luring tactic. The ML classifier strongly supports the malicious verdict. The primary attack pattern involves redirecting the user to malicious infrastructure.

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/pify?keyword=worship+sheet+music+free
    • http://files.easyfreightaustralia.com/uploads/1/3/0/8/130874169/lopite_xidomajot_kuguligipeponul.pdf
    • http://files.flotillahyves.com/uploads/1/3/2/7/132740435/573c5.pdf
    • http://xokum.tdpproducts.net/uploads/1/3/1/4/131453494/dda080b6c365493.pdf
    • http://pikon.jillebailey.com/uploads/1/3/2/6/132695584/bogavowawomobe_nanomesipom_monawiwi_ribel.pdf
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/corporate_finance_theory_and_practice_aswath_damodaran_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1256/1819/files/19155755270.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7831/0295/files/kifemepudugijoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/3613/0983/files/akinator_the_genie_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/90041950189.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8178/files/50430617392.pdf
    • https://cdn.shopify.com/s/files/1/0431/4605/1744/files/zolituwebil.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/6108770573.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_off00006475.bin
ac858916eebab96ece9f799b9efe3c377fb1504a92b596cfcf034c90483b998d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6475 5024 bytes
font_01_sfnt_off00007580.bin
f51c02fd830c260349e337976ccafb60e1d0d0d63a8074f5bb3a9de9d108b5d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7580 10380 bytes

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