Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ed3e711981f400…

MALICIOUS

PDF

42.2 KB Created: 2020-08-14 21:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 599ca5c4586dcfe8b3356ef2426b87e5 SHA-1: ae12a028d1b05bc74ba78a1bb3d57a6090b203f2 SHA-256: a9ed3e711981f400ac712489faadd5f544bd111dd56f6d127bf282a061a33ecb
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates a direct link to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of links, likely for SEO manipulation or to host further malicious content. The document body itself is heavily obfuscated but contains URLs that align with the link farm activity.

Heuristics 3

  • 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.
  • 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=cecilia+bartoli+vivaldi+album
    • http://files.theyeyechampionshipleagues.com/uploads/1/3/0/7/130738700/kurakuka_ruwurulawu_viratuwuxir.pdf
    • http://files.wild-woodbury.org/uploads/1/3/1/8/131860645/natisi.pdf
    • http://tabutux.ostervillegardenclub.org/uploads/1/3/1/3/131380005/3607751.pdf
    • http://files.mytravel.guide/uploads/1/3/1/8/131856991/dinexalabaro.pdf
    • http://files.thyroidlabguide.com/uploads/1/3/2/6/132695543/b1db8a03cd6.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1729/files/kobatujinunaz.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2661/files/jitozejamavawat.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/bilge_adamn_korkusu_oku.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/dubupoxorifibaxevenolup.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/venudugewij.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0439/0633/4888/files/38915700265.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/69839684994.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/70121498427.pdf
    • https://cdn.shopify.com/s/files/1/0438/4204/4066/files/44698060378.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/64251493324.pdf
    • https://cdn.shopify.com/s/files/1/0447/3107/2666/files/ayat_ruqyah_syar_iyyah.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_off00005a84.bin
214999f4eefab2eb9f990f158fc64f69c01971686dfafc1c74b738f1fa04f10a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A84 4908 bytes
font_01_sfnt_off00006b34.bin
8b1e0e9f3b37689a683d1b2c8f0bf0e2619fb4b0e10f2a1fa89d5fee0592a1b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B34 10068 bytes
font_02_sfnt_off00008da9.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA9 4324 bytes