Malicious PDF — malware analysis report

Static analysis result for SHA-256 6faed4d2d2ffd21b…

MALICIOUS

PDF

52.4 KB Created: 2020-08-06 22:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5cc4cd53bf26ddb088bbe8c3c301b25 SHA-1: d83eb43360b4cf04103359d1cfcc9a9be77ab06e SHA-256: 6faed4d2d2ffd21b2abfa8c04bc0b4e3a3c33294194819fc171a76d00b512b38
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=brahmacharya+ke+sadhan+pdf+download'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO manipulation or to obscure the true malicious destination.

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=brahmacharya+ke+sadhan+pdf+download
    • http://files.jerostique.com/uploads/1/3/2/7/132740594/koboti-puwozidogude-zazelip-ruwaxonuto.pdf
    • http://files.sthlmtapas.se/uploads/1/3/2/6/132695200/73172.pdf
    • http://madit.straightforwardtransportltd.com/uploads/1/3/0/7/130739777/45b37c6bbf29.pdf
    • http://files.m.wchqfm.com/uploads/1/3/1/4/131437085/lobuvalubama.pdf
    • http://sarebek.superiorlogworks.net/uploads/1/3/1/4/131453494/9117218.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/pinabipejaj.pdf
    • https://cdn.shopify.com/s/files/1/0449/1057/5771/files/configuration_asterisk_sous_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5085/files/arithmetic_and_reasoning_books_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/3278/8648/files/54035714176.pdf
    • https://cdn.shopify.com/s/files/1/0437/9148/3042/files/16129612134.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefopevepal.pdf
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/nolukifazogalesotuvutidu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8622/3262/files/rotuvemifakevewabaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/95459046168.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0293/files/32793009977.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/kavefumetibikufidakurego.pdf
    • https://cdn.shopify.com/s/files/1/0432/7007/8617/files/epigenetics_allis_2nd_edition.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ed3.bin
bde907d7de597054a71ca9bcda235e2f97dc8f4ed026c7fbf241592b5f8d8747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED3 5700 bytes
font_01_sfnt_off0000821c.bin
5d59e80714f055d0e20d1c4ed594903f00ea25dd365ddc0e243c90ca16be52db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x821C 2024 bytes
font_02_sfnt_off00008bb4.bin
c3d4e3df507b9a68f7bed5716e08103b3e952724b06b9be250472be1b81abf7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB4 10072 bytes
font_03_sfnt_off0000ae70.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE70 16164 bytes

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