Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3b86c97174eeaaf…

MALICIOUS

PDF

59.1 KB Created: 2020-08-08 09:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0dd922802d8ec50d0790ad0fb7f6b73 SHA-1: cc1a56816f87a42b6e663bad36e539a6eb2532ed SHA-256: c3b86c97174eeaafee111089961045999a84f8af75a04f555a88af5dbd4c3f99
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=ata+100+chapters+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are hosted on cdn.shopify.com but ultimately lead to potentially malicious domains. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated and contains a reference to the malicious URL, suggesting a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=ata+100+chapters+pdf
    • http://files.axiotac.net/uploads/1/3/0/7/130775400/dosimatogotufurizi.pdf
    • http://files.greaterpittsburghquickcash.com/uploads/1/3/1/3/131398188/996a59a.pdf
    • http://zefowu.absolute.technology/uploads/1/3/1/3/131379246/fifubewusadogotowi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0282/files/kimigegikoxatanunitaxaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/kigiraxe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/zefuberawexotapuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/anamorphic_illusion.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nudukesobiji.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/acreditacion_educativa_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/0348/6103/files/29621343448.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1266/files/business_ideas_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/99475111429.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zukax.pdf
    • https://cdn.shopify.com/s/files/1/0434/5544/7201/files/the_lemonade_war_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/palafasejuzanuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/jajepirufawaxugopilitize.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_off000090a0.bin
4c5507eac48399237dd574d267f0ce4c2288f5cf3afc30b623107b1160289f41
pdf-font-stream PDF embedded font (sfnt) at offset 0x90A0 4916 bytes
font_01_sfnt_off0000a165.bin
ee04c07cf54e9295ad131bb03a019ee5295fdb6bf11cb77da6865ffc0985756a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA165 15604 bytes
font_02_sfnt_off0000d14d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD14D 4324 bytes