Malicious PDF — malware analysis report

Static analysis result for SHA-256 50cd443f2d2f5494…

MALICIOUS

PDF

44.7 KB Created: 2020-08-22 18:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b390e96f1330eaa5df9324456ddfa05b SHA-1: 628c806b1aaf4c967e2282fea79468b132505fc2 SHA-256: 50cd443f2d2f5494bf85d4b77d39066f34f61e424070e632132d150446438031
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the string 'Incident report sample school' and a URL that matches the malicious redirector. The presence of a link farm hosted on Shopify, combined with the redirector, suggests a campaign to distribute malicious content or phishing pages. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=incident+report+sample+school
    • http://paxed.topnotchmanagement.com/uploads/1/3/0/9/130969077/872573.pdf
    • http://jaxerab.beheadstrong.org/uploads/1/3/1/6/131636908/f5d2b9618bcbe4b.pdf
    • http://files.whitetigersec.com/uploads/1/3/1/3/131398591/xuxemizo-kidufepelunara.pdf
    • http://rovoxelig.splashsteamboat.org/uploads/1/3/1/4/131453526/fipesoja.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/roxilepanemifekud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/20466312444.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/vakukamekemufowa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9502/3013/files/coronary_artery_disease_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/sat_books_free_2017.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/notepesolop.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3656/files/archimedes_contribution_to_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0436/1161/9491/files/54562459841.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_off00007273.bin
d29266e13fe4008cf1474d5697f01430cde1f52b09bec2aac37d2a4c660c9b12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7273 5248 bytes
font_01_sfnt_off00008409.bin
22d051f190cebe6829af941a76d67d6bb77fc1c261e7589b30d871592be26224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8409 9864 bytes

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