Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0591f8a4ea578f9…

MALICIOUS

PDF

47.3 KB Created: 2020-07-31 03:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 514136c6eea89fa765707036c261decc SHA-1: 989f5002722a80d9fedc78212ade42cca4f60aef SHA-256: a0591f8a4ea578f9165e1bde7d15e9de82001a9314ced20f4db0a579f8a3815f
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The primary redirect URL, https://ttraff.ru/pify?keyword=electronic+devices+objective+questions+and+answers+pdf, is flagged as malicious. While the document body is heavily obfuscated, the presence of numerous links, including those hosted on cdn.shopify.com, suggests a link farm or redirection strategy to lure users to malicious content. No scripts were extracted, but the PDF structure itself facilitates the attack.

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=electronic+devices+objective+questions+and+answers+pdf
    • http://files.vcdiamond.com/uploads/1/3/1/6/131606331/riwifanisag_masemekubemer.pdf
    • http://files.jordanslavish.com/uploads/1/3/0/9/130969435/6041731.pdf
    • http://files.brownsnotebook.com/uploads/1/3/0/9/130969003/xisixilapar-faninenon-roramuvitaw.pdf
    • http://files.vcdiamond
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16175378270.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4682/files/67979989312.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6818/files/4524025793.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/5117114549.pdf
    • https://cdn.shopify.com/s/files/1/0431/1891/9837/files/30219296386.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/notowidoga.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/fidumuxodajezabut.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8537/files/13106245723.pdf
    • https://cdn.shopify.com/s/files/1/0436/7328/8869/files/ponogixarife.pdf
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/nefawopaxijofapexuwosadux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7862/3138/files/98862200322.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/titulozirabuzizobeviw.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_off000079d1.bin
bc2549294555bcde60f8bcd180e7044b9d0447bed2be2e2439da2af0b4eeef93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 5484 bytes
font_01_sfnt_off00008c8f.bin
26868c53d0a0c2d558614c3b9e7d21392c401d6997543fa3cacf20aa8d71dc8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8F 10332 bytes

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