Malicious PDF — malware analysis report

Static analysis result for SHA-256 9440de6d81f516ca…

MALICIOUS

PDF

46.1 KB Created: 2020-08-11 03:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cee87b0eee31e8ea0669a0b46076398 SHA-1: d359c48611b11b168e18dd79ffdb092c300be40e SHA-256: 9440de6d81f516ca37567410660f486cc9387ef73094caaf341c81fe77eb85ca
120 Risk Score

Malware Insights

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

The PDF file contains embedded links that lead to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure for '5th grade math word problems worksheet pdf'. The primary malicious IOC is the redirector URL, which is likely used to serve further malicious content or phishing pages.

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=5th+grade+math+word+problems+worksheet+pdf
    • http://files.foundationoftruth.net/uploads/1/3/2/7/132712235/sogubidog.pdf
    • http://files.marencoartrestoration.com/uploads/1/3/1/8/131871894/5632b4cd.pdf
    • http://files.soundviewhomeinspections.com/uploads/1/3/1/4/131452823/7302261.pdf
    • http://files.teamcenterinc.com/uploads/1/3/1/8/131856991/wewawufilidutowagax.pdf
    • http://files.eastlakepta.org/uploads/1/3/2/3/132302963/423789.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/bojedosejufozuwus.pdf
    • https://cdn.shopify.com/s/files/1/0446/6117/8521/files/cooking_fever_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0433/9885/6867/files/xololizefe.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/xozadosizotapubeva.pdf
    • https://cdn.shopify.com/s/files/1/0428/5559/6198/files/lowipovuzivolopeta.pdf
    • https://cdn.shopify.com/s/files/1/0444/4097/7574/files/ancient_fruit_wine.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/besos_de_chocolate_mara_young.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/71080302694.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/zofuvusojunirasevoged.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5062/files/electronics_and_communication_engineering_thesis.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_off000075a9.bin
3bf7470baf0c433c118ffdb0e1d65a057d02924e4ebed1d31bf60315d184a742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A9 5780 bytes
font_01_sfnt_off00008943.bin
aca64c568e49e982795528a5fac9c302994f14631b7c2c8a24cc70bb049d8ef3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8943 9876 bytes

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