Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04be7f9e2c9fdee…

MALICIOUS

PDF

46.6 KB Created: 2020-08-14 12:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e23567bc9e10555086a2a8b77dbc11b SHA-1: c12a1a19f903523d4289cc0651aca0ea1a676e38 SHA-256: e04be7f9e2c9fdee56ad24263978a0624aa8a6a3e74a2cf446e7760193995392
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text related to a 'Skeletal system diseases worksheet' and the malicious URL 'https://ttraff.cc/pify?keyword=skeletal+system+diseases+worksheet'. This suggests the document is designed to trick users into clicking the malicious link, likely leading to a phishing page or malware download. 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.cc/pify?keyword=skeletal+system+diseases+worksheet
    • http://files.teganpoo.com/uploads/1/3/1/0/131070402/lexuvafufotikamu.pdf
    • http://files.newwestminsterchristadelphian.org/uploads/1/3/1/3/131397987/5573998.pdf
    • http://mopok.faithfulchurch.org/uploads/1/3/0/7/130776757/xufobiwuvu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/alumbrado_publico_con_paneles_solares.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/alternating_current_fundamentals_herman.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/astm_e837_13.pdf
    • https://cdn.shopify.com/s/files/1/0434/1235/7270/files/76012394324.pdf
    • https://cdn.shopify.com/s/files/1/0432/5444/8286/files/zufajofuvidalilupax.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/22841889518.pdf
    • https://cdn.shopify.com/s/files/1/0437/5963/2545/files/40142850101.pdf
    • https://cdn.shopify.com/s/files/1/0431/4395/4594/files/8229928332.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1543/files/subukukevesibawevatefusu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/nusije.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/37388526867.pdf
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/87293742487.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_off0000771c.bin
f5f5133d834699eeea78031846e33e3f3a42e6d57983e6c9f61b9be7fd33d0e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771C 5428 bytes
font_01_sfnt_off00008978.bin
f3c2a3f3c5fc35439d931acbc576d4b701effe634811a3da43f7743a44ffc545		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8978 10416 bytes

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