Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5722fc9ec6574f…

MALICIOUS

PDF

117.5 KB Created: 2020-08-11 02:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c92c64f0ef82dc2d7dc795c3a506ca62 SHA-1: 086c2f9dcc48401cf376d3a641ba4ffd7638d2f6 SHA-256: 0e5722fc9ec6574f033e1dab44b23087199f9ac50fc9bb261e12bbd20e6e662e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as an emergency caesarean section document. This redirector likely leads to further malicious content or malware. The PDF also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic to distribute malicious content.

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=emergency+caesarean+section+pdf
    • http://files.thenewblendworthcentre.com/uploads/1/3/2/6/132682167/vevirukemiluwok_rositelezebixu_sofumubuxop.pdf
    • http://files.fairlingtonfins.org/uploads/1/3/0/8/130813778/7a5f1ad.pdf
    • http://files.manjaroresort.com/uploads/1/3/1/4/131453897/0b388.pdf
    • http://files.bradleyestates.co.uk/uploads/1/3/2/6/132682570/wirifobeje.pdf
    • http://files.paint4all.net/uploads/1/3/0/8/130874023/romizez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/45469018847.pdf
    • https://cdn.shopify.com/s/files/1/0432/1496/2848/files/64764330561.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9603/files/42434752360.pdf
    • https://cdn.shopify.com/s/files/1/0434/4312/6438/files/anterior_cruciate_ligament_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0078/files/21516600932.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/kimuwik.pdf
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/74010724988.pdf
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/rake_db_commands.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/93815993412.pdf
    • https://cdn.shopify.com/s/files/1/0440/7132/1752/files/48498156585.pdf
    • https://cdn.shopify.com/s/files/1/0445/5625/5396/files/unix_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/8135/8759/files/26500322270.pdf
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/dafapoduzifeliwakuvu.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0001ade5.bin
31797082dc1be62f7943281b358b41149fdbf51bbec005e54f51c0a3409db6d6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1ADE5 17268 bytes
font_00_sfnt_off00015d79.bin
13396884de22013ae29799631abfc3e4d4efca883ab8fb36383f3bf90958c024		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D79 5320 bytes
font_01_sfnt_off0001703a.bin
46de7e9bd12e800d314fde4eb20134d51a17cfabf3905412d056acc8f6fd23a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1703A 5504 bytes
font_02_sfnt_off000182dc.bin
a3c54f0e69e76a7796fb3d316f5144e7ec6fce383a32199a12d3abae0fe3494d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182DC 13272 bytes

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