Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fce1446d5404a02…

MALICIOUS

PDF

41.5 KB Created: 2020-08-22 04:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa7126356ea4e2c1e60f417f1dbd4d9c SHA-1: 2e598de7f2bd730c08b6eb1ef6a0ac09cb8a8f38 SHA-256: 0fce1446d5404a02f5b38b7999e75791db93c8cbf16942a6130586f4cdb6a033
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document's intent to trick users into downloading a password-protected archive, likely to bypass security scanning. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=trainer+burnout+paradise+pc
    • http://files.lindalavender.com/uploads/1/3/1/4/131437061/davikedobavanaf_zaganaziderapo_keloxabeba_safagifek.pdf
    • http://files.katiemachain.com/uploads/1/3/1/4/131455283/57a787ca629.pdf
    • http://files.balasanabodywork.com/uploads/1/3/1/8/131871894/725b52275d6d98.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/segabiwowubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faramerujinusopuko.pdf
    • https://cdn.shopify.com/s/files/1/0437/6802/1141/files/eastern_nc_saltwater_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/3591/8489/files/69350344313.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/dusolukasex.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/31439524572.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0661/files/sabbath_school_lesson_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/97164482357.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/gikutaleve.pdf
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/damodaran_on_valuation_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/najas.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4760/files/centurylink_prism_tv_guide_phoenix.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/joluwuzeluwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/50914790757.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/notes_on_digestive_system_of_human_body.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006397.bin
0ec495ad7cc814510641e931a787274ba8d7b29f83f8700e13a34ccd106cf1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6397 5124 bytes
font_01_sfnt_off000074f8.bin
2bdce68e1ca3dc61029dbdeab4c51680c194703b6a22509a5c89cd3fe90340c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F8 10608 bytes

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