Malicious PDF — malware analysis report

Static analysis result for SHA-256 699cd826482806c1…

MALICIOUS

PDF

70.3 KB Created: 2020-08-13 21:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25da7b6885ba5899bedabacfd39fad2f SHA-1: 6dda6feb7168b608835c782d35a58511b77f053a SHA-256: 699cd826482806c13cb421582c01baf7cc94f72621cf656f787401ae28dd8162
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered this heuristic. The presence of a password-protected archive lure suggests this PDF is part of a multi-stage attack designed to bypass security gateways.

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=manual+estados+financieros+smv
    • http://foruteki.clbmg.com/uploads/1/3/1/4/131410812/wonalezasafo-juzilovazal-teregimapeg.pdf
    • http://fuxemu.falconrydisplays.com/uploads/1/3/0/8/130815017/4197557.pdf
    • http://files.cardmainea.com/uploads/1/3/1/1/131163492/6410905.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/puvarobo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/80885358817.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/86943239026.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/ronidalaxaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/xiselorejozetukose.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/65371847782.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/fabilatukumagin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22411539251.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4486/files/zorepowesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/5039760545.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8545/files/50_shades_of_grey_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/xepurutikivosutan.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4ef.bin
8f513e786cdd30a182eb6b701ea75a51e27f210362ae1e1f026ea443bfad6c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4EF 5116 bytes
font_01_sfnt_off0000d640.bin
a60c6f7ef9cb2110d8dc1907cf6e671430d7c0c2b095431b01e2680f0f2c956a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD640 11780 bytes
font_02_sfnt_off0000fc2f.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2F 4324 bytes

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