Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9dde3a785f9ed2…

MALICIOUS

PDF

42.6 KB Created: 2020-08-25 05:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dabdfa4d3129d6a96f41094aa626a745 SHA-1: 9b3b1a43e0b34b11ecc736a61b81e5e0d177fee5 SHA-256: 4e9dde3a785f9ed29eb6bdcc8f5e1dcb1c6582652daeb6e6b2c17e4f17098add
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a download for the Nintendo Switch online app. The document body and numerous embedded URLs further support this lure. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed for SEO manipulation to attract victims.

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=nintendo+switch+online+app+apk
    • http://files.peacegourmethoney.com/uploads/1/3/1/3/131384340/kefese-bipoloz.pdf
    • http://nulam.davidbentonphotography.com/uploads/1/3/1/8/131857631/fimaselerava.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/budaya_populer_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/dilixizevipewebal.pdf
    • https://cdn.shopify.com/s/files/1/0434/3794/9090/files/vidowaparumu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/51735139767.pdf
    • https://cdn.shopify.com/s/files/1/0439/6505/5134/files/xajovexuxotujovotabad.pdf
    • https://cdn.shopify.com/s/files/1/0437/5373/4298/files/majetemivofepetevat.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/wuwewamenogomofagedutev.pdf
    • https://cdn.shopify.com/s/files/1/0448/2557/5581/files/medusuj.pdf
    • https://cdn.shopify.com/s/files/1/0453/3685/4683/files/hammer_candlestick_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/20388935116.pdf
    • https://cdn.shopify.com/s/files/1/0432/6499/9588/files/62847882448.pdf
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/fundamentals_of_vibrations_meirovitch.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_off00005d22.bin
eec2311198495a4bc353016469730966835d49679daeed18a98faa9ab15954d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D22 2828 bytes
font_01_sfnt_off0000672c.bin
cbbaa227c9514b426adefe924450f1824844bcf2bf0d9667df5df6526d1692da
pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 5188 bytes
font_02_sfnt_off000078e7.bin
4c75ab9a62f17e2531c790c99c1f4b4a12e8415ef08220840b245b399198b736
pdf-font-stream PDF embedded font (sfnt) at offset 0x78E7 10620 bytes