Malicious PDF — malware analysis report

Static analysis result for SHA-256 28d12356d7635151…

MALICIOUS

PDF

41.5 KB Created: 2020-08-03 16:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83b014ae866f110d2b25624ae5f3b18c SHA-1: a120fa42f73fd652a7f28d30954ff82ce93a4853 SHA-256: 28d12356d76351518a8ef3aaa326ee137ae877b8177cc6335ffe0e8e2d4ea996
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to a 'treble clef notes worksheet pdf' and a URL pointing to a redirector. This suggests a social engineering attempt to trick users into visiting malicious sites.

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.com/pify?keyword=treble+clef+notes+worksheet+pdf
    • http://files.ueshirofloridakarate.com/uploads/1/3/1/8/131856072/zofekofi_nopil_rakezisup_mobadojegifi.pdf
    • http://files.captaincillian.com/uploads/1/3/0/7/130739238/fojifumonod_kiwogi_kumiva_xegok.pdf
    • http://limuku.dylanbeddow.com/uploads/1/3/0/7/130740025/6473540.pdf
    • http://nugusi.millersgardenservices.co.uk/uploads/1/3/0/8/130814575/xajaselejediwef.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/36212068680.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5878/files/9932299366.pdf
    • https://cdn.shopify.com/s/files/1/0431/1885/4306/files/96772358919.pdf
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/bojitemikixufopopo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/maxon_liftgate_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/93686507756.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/malopemax.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/49730779225.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/dedibitugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1858/files/foduvagojizagol.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_off000062be.bin
93532ffce156e7b570cd58c9dcda11994b327c0701e5aa4132c90d8460abaf6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BE 5276 bytes
font_01_sfnt_off000074be.bin
545872a06cb37ff64c8ffd5b2ecc25b06d477e8601553111baf5c30e3dc8802b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BE 10204 bytes

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