Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae121caf0e9005d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-20 01:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 401036baabb587e371700d93aef549c0 SHA-1: 22111890d99d40992790fdf340b817ac0da3a30d SHA-256: 0ae121caf0e9005d7fc11960634fa6cd67aef147473111a6f4d63951718797b5
154 Risk Score

Malware Insights

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

The PDF contains a link disguised as a watch manual, which redirects to a malicious URL. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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.cc/pify?keyword=casio+g-+shock+tough+solar+watch+manual
    • http://files.ederbeanfaceart.com/uploads/1/3/1/3/131379525/xisemuwete.pdf
    • http://files.aquaviewvilla.com/uploads/1/3/0/7/130775786/a37c274a01e8c5f.pdf
    • http://bulenawu.budgickphotos.com/uploads/1/3/2/6/132695384/raxezu-bitefapobuzonu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/great_food_fast_bob_warden.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/behaviorism_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/mawusebojupenetunakex.pdf
    • https://cdn.shopify.com/s/files/1/0435/0849/8591/files/fakoloxajisigisawira.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/29168302105.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/guzitipisemagilapizib.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/dowry_harassment_act.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/taipei_metro_map_english.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/toomanyitems_mod_for_minecraft_pe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/zapirobunusexik.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/cedulas_de_auditoria.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/paxisiwefuwuje.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_off00006b09.bin
29801d92b5c90d1bb36f6d9e0fc1489d6cd28572a0893414a0dcb7708671dcee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B09 5308 bytes
font_01_sfnt_off00007d09.bin
8706588c3f1e6bc0b282102421b0528b849d3d6f3226b9e58a139f6b65452123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D09 10684 bytes

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