Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df721ed98cf79dd…

MALICIOUS

PDF

46.5 KB Created: 2020-08-03 04:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 763eb7c734de24b9eddad2d64775be6e SHA-1: a39919299524d0eb6f1ca0663748b0865c70344b SHA-256: 9df721ed98cf79dd832f70adc6012db34393b583e163ab05d832273c814aacae
120 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, with one critical heuristic identifying a link to a known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=kayla+itsines+diet+plan+pdf. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious content. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. No scripts were extracted from this sample.

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.ru/pify?keyword=kayla+itsines+diet+plan+pdf
    • http://files.aldersgatebutte.org/uploads/1/3/1/4/131453245/4959187.pdf
    • http://files.poehaku.com/uploads/1/3/1/6/131607239/ab7f23f.pdf
    • http://files.aoh-patrickryandivision.org/uploads/1/3/1/4/131438067/befawavarojajin.pdf
    • http://files.languagelearninglab.org/uploads/1/3/2/8/132814073/fba70aa9e8b281.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/50046927787.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/9644474429.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/gokimapik.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/niludapalazoxol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3077/files/fictitious_business_name_orange_county.pdf
    • https://cdn.shopify.com/s/files/1/0429/1854/3523/files/21316860253.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/52889513950.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/24092580637.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/unity_restart_scene.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/kanokanatafajiguganosikux.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_off000077f2.bin
7f2ffd4d81e14f12033dfd1071df696554e417e32db6a4f95b099d09bce218a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F2 5008 bytes
font_01_sfnt_off00008923.bin
540cc974d81e685cb645efeae166683bf8b530a0239f0405fe0a6b03bb3c487c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8923 10628 bytes

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