Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1fd769f2b204f8…

MALICIOUS

PDF

50.3 KB Created: 2020-08-10 23:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a91afa97213137564dc4409ab8bfb346 SHA-1: c6f3b5bec83c9d3b586a11c5b14379e582767a9a SHA-256: fe1fd769f2b204f81a4eb4525ffd12bc719bc2790a7de575963163fce48bfd96
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'statistical quality control 7th edition solutions pdf' and the malicious URL, suggesting a lure to download a fake solution manual. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the malicious nature of the links and the spam-like distribution method. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=statistical+quality+control+7th+edition+solutions+pdf
    • http://xidal.patrickhowe-postpersonalism.com/uploads/1/3/1/4/131453133/xufalusuwap_dewutepiv.pdf
    • http://futabepid.ninetyfiveandbeyond.com/uploads/1/3/0/7/130776208/nuzer-nedodesapif-rabavumewab.pdf
    • http://files.susanlynchshamanicservices.com/uploads/1/3/1/0/131070309/gemiloz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5664/files/xatamo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/gurafidukepugado.pdf
    • https://cdn.shopify.com/s/files/1/0437/4000/4501/files/jevezesidapirenituf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/abordagem_triangular_no_ensino_das_artes_e_culturas_visuais.pdf
    • https://cdn.shopify.com/s/files/1/0433/8004/8023/files/bozinuvugaj.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/hard_boiled_egg_diet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/97662608396.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8276/files/12191658274.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/euphonium_scales.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_off0000783a.bin
45a74114feb800fc7f0b5b41ec08bc484afa37342f78df919ecf646a21f03ffd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783A 5656 bytes
font_01_sfnt_off00008b78.bin
b43dee66d3a890eb34181dc18511ddb2d400f1dce784922e46811904d49d60fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B78 15124 bytes

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