Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea6c2236c923e10…

MALICIOUS

PDF

50.8 KB Created: 2020-08-05 11:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ef1b091b39096d5a524b02c031f2a37 SHA-1: 4e9d001bee5a151b65020a3f9d4946c205188b5c SHA-256: 6ea6c2236c923e102fe82f06851f9f1936abe8446096ce86fcb32b19de509cf4
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as a tool to convert PDF to Word documents. This link, 'https://ttraff.ru/pify?keyword=how+to+convert+pdf+file+to+word+document+offline', leads to known malicious infrastructure. The document also hosts a large number of external PDF links, likely for SEO manipulation or to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=how+to+convert+pdf+file+to+word+document+offline
    • http://files.spyratoschiropractic.com/uploads/1/3/0/9/130969652/tebozuzasela_nenutem.pdf
    • http://files.realmagicroadshow.com/uploads/1/3/0/7/130775635/9426746.pdf
    • http://files.canadoretv.com/uploads/1/3/0/9/130969446/5290b.pdf
    • http://fisatine.nazarenechurchlurgan.com/uploads/1/3/2/6/132681579/dezin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/40510340382.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/siduda.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/bapow.pdf
    • https://cdn.shopify.com/s/files/1/0440/6309/6984/files/94603602451.pdf
    • https://cdn.shopify.com/s/files/1/0433/4210/2679/files/believe_in_yourself_by_joseph_murphy.pdf
    • https://cdn.shopify.com/s/files/1/0428/2512/1959/files/highly_composite_number.pdf
    • https://cdn.shopify.com/s/files/1/0428/1348/9318/files/caftan_pattern_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/91194018228.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1125/files/40198006017.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8905/files/top_down_network_design.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/kowizodese.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/17385871908.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_off00007b5c.bin
0d9eddad517d0278606780ce679b473668a3d1a8c6d943c90749cd757d1d66a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5C 4908 bytes
font_01_sfnt_off00008c03.bin
a8b364222e0be7177068c790fa8ecb03aec356030be1885004a489642abf623a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C03 10476 bytes
font_02_sfnt_off0000afdf.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDF 4324 bytes

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