Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a9e29c66625289…

MALICIOUS

PDF

61.1 KB Created: 2020-08-10 06:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b77e2352bee184193db9fe4d5992449 SHA-1: f569bf538da9ff02c3cb5ec18c2993afcc15d1ee SHA-256: 76a9e29c666252894c2e2120994ce43aa4666caf7c44c10c8dc5741cb7786cce
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with a primary link directing to a known malicious redirector. This suggests an attempt to lead the user to malicious infrastructure, likely for further exploitation or phishing. The presence of a link farm further supports the malicious intent by attempting to obscure the true destination and potentially leverage SEO tactics. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=conducting+polymers+pdf
    • http://tugogoko.lawyer-netherlands.org/uploads/1/3/2/7/132741555/tixerulojuxuz.pdf
    • http://files.sausalitocrystalgallery.com/uploads/1/3/1/8/131856626/c0f8a6580e1bc80.pdf
    • http://dewop.americasbluesmovie.com/uploads/1/3/1/1/131163599/jojudigima_ruzatewi_visoniwu.pdf
    • http://files.zealscattery.com/uploads/1/3/0/8/130814055/7144871.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/4234/6907/files/wonawuforanir.pdf
    • https://cdn.shopify.com/s/files/1/0431/9051/7911/files/44086165019.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/zosasedezefubisuluzaji.pdf
    • https://cdn.shopify.com/s/files/1/0432/1044/0862/files/65593277439.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/35737909097.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/24403399510.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1966/files/la_villa_cesar_aira_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/webm_to_mp4_converter.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/59098067606.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6889/files/48599156557.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/92907057704.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/bimoxiwepavijo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/32959838543.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/jegozebexewefovisapevebeg.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_off00008610.bin
795c97374e42d09807fa5f67dd5fb18834c5c1c5a6fb1a5b617bb27d1f4cac1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8610 5272 bytes
font_01_sfnt_off000097f6.bin
2a1c079068b0e2939a0552d1751267b52c7f953edbe3fb45fd6be61f65ea6923		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97F6 13656 bytes
font_02_sfnt_off0000c38a.bin
aabbb95e4258a1bccfe6759090a0a8b97a33e8154131110566ffb2eaa8fdb080		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC38A 16148 bytes
font_03_sfnt_off0000d880.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD880 4324 bytes

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