Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3de50405b55fc1e…

MALICIOUS

PDF

40.7 KB Created: 2020-08-08 11:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4f3e938b7b53153b5327621ab8eb3e0 SHA-1: 66bf99c9c8224b63b97e0ea1645b9d5c9fa61c83 SHA-256: d3de50405b55fc1e9afc483a45b9f430164205913e7f972381d0b72fca6161b3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a prominent link that redirects to a known malicious domain, ttraff.com, disguised as a catalogue download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this malicious redirection. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many pointing to Shopify domains, suggesting an attempt to manipulate search results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=telecharger+catalogue+schneider+pdf
    • http://melafutil.thewineswirler.com/uploads/1/3/1/6/131606069/poxotulosizaviziju.pdf
    • http://files.petersonskattumrealtygroup.com/uploads/1/3/1/8/131856331/dofonude.pdf
    • http://kakaso.alexandrakwilson.co.uk/uploads/1/3/0/9/130969742/devitubogolulotorovu.pdf
    • http://merub.artfullibations.com/uploads/1/3/0/9/130969300/9286f32ec.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/gelarif.pdf
    • https://cdn.shopify.com/s/files/1/0427/5588/3175/files/spelling_activities_year_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/lufesexisanalujetazekon.pdf
    • https://cdn.shopify.com/s/files/1/0447/8458/2813/files/super_mario_64_ds_rom_doperoms.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/17883298493.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4010/files/22966067931.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/babbitt_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/2546868142.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0431/0630/4153/files/logistic_regression_spss_interpretation.pdf
    • https://cdn.shopify.com/s/files/1/0432/2561/2450/files/789475251.pdf
    • https://cdn.shopify.com/s/files/1/0431/6951/3632/files/96946504740.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_off00005012.bin
b11d3692fae7561a77def336342dfa6114452632b407bd62ec20fdcc66717181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5012 5368 bytes
font_01_sfnt_off0000624c.bin
2760f75b96f5d98b74abc3263bf27455bc176adced7af6c01af3055b683ce528		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624C 15660 bytes

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