Malicious PDF — malware analysis report

Static analysis result for SHA-256 02bd1d5cebf24f75…

MALICIOUS

PDF

42.4 KB Created: 2020-08-07 13:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94b09bb634c88ef08318adf51496282f SHA-1: 8d88d6d1e3851fcd3d6a7e675c5ad91651494090 SHA-256: 02bd1d5cebf24f756003e42a1ca5df1d0d9c9bf0334ea78e0816ecc6b639ae7a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of multiple external PDF links suggests a link farm or SEO poisoning tactic to increase visibility and click-through rates.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=business+intelligence+software+at+sysco+pdf
    • http://files.newdawnguatemala.org/uploads/1/3/2/7/132712154/da9fb4b49f470a.pdf
    • http://files.wallermarchingfestival.com/uploads/1/3/1/3/131381241/koveluworuvuteba.pdf
    • http://files.school.zion-cologne.org/uploads/1/3/0/7/130738799/nojusafeme-widojabemot-netuxapo-fojeke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/38399421216.pdf
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/rupesifikupafit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kofuka.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/gafuvoxobulomigamav.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5621/files/les_moments_vrais_barbara_de_angelis.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/pura_vida_beginning_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0433/7310/1214/files/73882747293.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8799/files/bitozesota.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/head_to_toe_assessment_script.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/justin_bieber_sorry_song_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/sistema_bethesda_para_tiroides.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/jekigazedevukixokojisobo.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_off00006479.bin
283bc6732c96f83ab0dcad2d2bfbb9ba5c0bd69a163b8ec16c05c0ff1e8141f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6479 5564 bytes
font_01_sfnt_off0000779b.bin
061ddd96da7411a4d758f530cc53d89a3775c63998d068ef083225058a8a6ef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x779B 10728 bytes

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