Malicious PDF — malware analysis report

Static analysis result for SHA-256 1108623a97a795ca…

MALICIOUS

PDF

42.7 KB Created: 2020-08-22 14:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4a25e59d69656a2403d0f9e47fa2162 SHA-1: 66f76c342b7ba97e347271cc5b5c68940020539c SHA-256: 1108623a97a795ca1f1ee3afa704ee8204b0efe943e8d91182e18c76fd253cf5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the presence of embedded URLs and the ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

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.ru/pify?keyword=corrugated+cardboard+sheets+pretoria
    • http://files.contessablack.com/uploads/1/3/0/7/130739570/3037b8b16b53.pdf
    • http://kabutubi.lictusoilandpropane.com/uploads/1/3/1/3/131398294/3091940.pdf
    • http://jazov.targetedevidence.com/uploads/1/3/2/7/132740470/jebipupup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/0736/9639/files/gatenegef.pdf
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/habitos_alimentarios_libros.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/whirlpool_duet_washer_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9990/5429/files/zovigu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/interactive_electronic_music_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/8297/2326/files/86862577773.pdf
    • https://cdn.shopify.com/s/files/1/0448/1817/0018/files/cica-_care_scar_treatment_gel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/86558851590.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/indesign_print_booklet_to_spreads.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9178/files/64081157271.pdf
    • https://cdn.shopify.com/s/files/1/0431/0519/0041/files/benefits_of_reading_for_students.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_off00005a55.bin
6604a84bb2ebf6cc517f301bf2d0b07b4708bf39ed178a49c13b3075419ce6d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A55 5240 bytes
font_01_sfnt_off00006c36.bin
be2e611697fc4a4cd7823bdd3a44e99b935be4ee31e49e27ec37c95bcd2a5714		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C36 10456 bytes
font_02_sfnt_off00008fca.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCA 4324 bytes

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