Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d8d716d4f782c2…

MALICIOUS

PDF

50.2 KB Created: 2020-08-07 20:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9a5d1ed73745070b498e9e1647c831f SHA-1: c811d34da311c9a46087187c266ed2e0513650c3 SHA-256: f6d8d716d4f782c2556648387be079c47a02b8b20ac3c6036926c82033d4bb86
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though partially garbled, suggests a lure related to traffic violations. The primary malicious URL is https://ttraff.cc/pify?keyword=bi%25E1%25BB%2583n+b%25C3%25A1o+giao+th%25C3%25B4ng+%25C4%2591%25C6%25B0%25E1%25BB%259Dng+b%25E1%25BB%2599+2020+pdf, which likely leads to further malicious content. The ML classifier strongly supports the malicious verdict.

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=bi%25E1%25BB%2583n+b%25C3%25A1o+giao+th%25C3%25B4ng+%25C4%2591%25C6%25B0%25E1%25BB%259Dng+b%25E1%25BB%2599+2020+pdf
    • http://files.ankyloglossiabodyworkers.com/uploads/1/3/0/7/130740097/e92bcff7c5.pdf
    • http://files.onelasalle.com/uploads/1/3/1/4/131438142/duxezivelevu-jasinobelojopo-lodusolipur-jusos.pdf
    • http://files.randolphbush3.com/uploads/1/3/0/7/130775859/7752cc62a34.pdf
    • http://files.tonicher.co.uk/uploads/1/3/0/8/130813988/1ae394.pdf
    • http://files.pentonparkbrewery.com/uploads/1/3/1/6/131606807/890001bbe2.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/nekorusuvaduwasexexanuxal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/79607225840.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/28474405398.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/65232382268.pdf
    • https://cdn.shopify.com/s/files/1/0431/8717/5588/files/beviwurelasunojezom.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/sudarumisaxodi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0328/1571/files/1000_books_to_read_before_you_die.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0449/9632/9636/files/apc_smart_ups_1000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/briefer_history_of_time.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/neurological_disorder_books.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/bazakukudeda.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/kalphite_osrs_slayer.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069c0.bin
6588d00cf866d7073cb73877f0f7c918582786b6a8c5a8d7f18fd2bed953de05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C0 6328 bytes
font_01_sfnt_off00007de6.bin
c2801c64ea11d49f23fa0299c22175f94baf2c0903ae08eaae0081fbfdbf1469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE6 21024 bytes
font_02_sfnt_off0000aaaf.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAAF 4324 bytes

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