Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eed35307fef1b39…

MALICIOUS

PDF

47.8 KB Created: 2020-08-06 20:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adc2c5f3a6d3ce8b1a410a5178e30f0a SHA-1: aef2d36720cea229343387fa7cb044f4478454e1 SHA-256: 2eed35307fef1b391ca4df4d1720ca00910821b5553267bda29aa1485376bf0b
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links, suggesting a lure to external content. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=project+problem+statement+pdf
    • http://files.thenfrc.org/uploads/1/3/1/6/131636988/3422ca2131caf4f.pdf
    • http://files.mantleofelijah.org/uploads/1/3/1/6/131636745/befozoxolasade_lixozenafoliko_verijedilanez.pdf
    • http://files.bcbsca.org/uploads/1/3/2/6/132682685/5772793.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/lofovubabazowamiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/furowoxuboguxuxofip.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/norman_dorf_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/73841812115.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/17702935565.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/kudupotuzozejuzazas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0433/3115/8175/files/python_list_partition.pdf
    • https://cdn.shopify.com/s/files/1/0432/3442/7047/files/didufibisu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/fadeluw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5270/3645/files/91810205761.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/toyota_radio_wiring_diagram.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072b9.bin
b43bb5e23d08db1152e46be648f3b995be9aae37436d20f20b10a8f523a21945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B9 5516 bytes
font_01_sfnt_off00008557.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8557 1800 bytes
font_02_sfnt_off00008de5.bin
7ac2d48c928b548d7e2d4edaf1ef063d2339c1494bd00e3dc758b74b7b505d12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE5 10516 bytes

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