Malicious PDF — malware analysis report

Static analysis result for SHA-256 5476bbc11ec199b9…

MALICIOUS

PDF

47.2 KB Created: 2020-08-06 22:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09f996782329aacdc37f329774d5c58b SHA-1: 3f5f9bde50cf983fbfb761123447de571522f942 SHA-256: 5476bbc11ec199b9d0696c5d8299877da658d58bd6b55b51a266d1d7fa80c3da
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and references 'pdf editor online change text', suggesting a lure. The PDF also hosts a large number of external links, many hosted on Shopify, indicating a link farm likely used for SEO poisoning or distributing further malicious content.

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=pdf+editor+online+change+text
    • http://files.hamradioworks.org/uploads/1/3/0/9/130969987/37ff3d8.pdf
    • http://rubofefip.erinmdesign.com/uploads/1/3/0/8/130813834/jufom.pdf
    • http://files.fracturedpottery.com/uploads/1/3/0/9/130969440/visaxojoninig.pdf
    • http://xaregi.dailygodwalk.org/uploads/1/3/1/6/131606407/9643792.pdf
    • http://files.antonbarichconsulting.com/uploads/1/3/0/9/130969718/3610361.pdf
    • http://files.ha
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/nakagavoxobogo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/changes_anthology_of_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0433/0510/7620/files/fight_me_emoticon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12584167006.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/3081132389.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/30072451387.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/76889121372.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/79857490176.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4982/files/97937092260.pdf
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/mysql_stored_procedure_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0101/files/megibejotulobex.pdf
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/tatogezezozobaveku.pdf
    • https://cdn.shopify.com/s/files/1/0432/9734/1604/files/79530250551.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007930.bin
9beb21f46e90e03335fee8afc884b4283f297200373becf0e9bc9f67be47f9d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7930 5172 bytes
font_01_sfnt_off00008aca.bin
ea7831d98a9d482325158455ca33da25f6cd1d2e2a632dd9c5efa65693fec6bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACA 10748 bytes

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