Malicious PDF — malware analysis report

Static analysis result for SHA-256 de03a3f1f12c2536…

MALICIOUS

PDF

66.5 KB Created: 2020-08-17 14:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cc70003a12828f2aef8f98997900575 SHA-1: fd7b2ae6228511752caabaa5a3685dab890908dd SHA-256: de03a3f1f12c2536585e55d7a452111f5fef1a96cb71c6d919c274e268b7d62a
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a download button, intended to lure the user to a malicious site. The document body, though heavily obfuscated, contains the same malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dbt+coping+skills+worksheets
    • http://files.mezoopets.com/uploads/1/3/1/6/131606046/7387545.pdf
    • http://files.albertaprimitiveskillssociety.com/uploads/1/3/1/4/131453028/9333335.pdf
    • http://bonaw.jazzyjohnz.com/uploads/1/3/1/0/131070872/b74ede43026.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0909/files/android_battery_saver_mode_pie.pdf
    • https://cdn.shopify.com/s/files/1/0435/6918/4931/files/29739980562.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93880590480.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/74415767586.pdf
    • https://cdn.shopify.com/s/files/1/0434/9191/7989/files/international_champions_cup_2020_fixtures.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/introductory_chemistry_corwin.pdf
    • https://cdn.shopify.com/s/files/1/0429/1565/9942/files/gopududeraganuzabala.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7014/files/93748771219.pdf
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/62909266475.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/mepogemuwuxajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/suwegav.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/30611037258.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5601/files/galekexufebizerababepes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6f3.bin
9c00196a3470f63f360a1eb439a07fc1c3e2f41eabe775991246bb629a53b232
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F3 5280 bytes
font_01_sfnt_off0000d8f9.bin
1bc59e08ae9da6169eaceb14fdadaf304d80de5f3482af78e5b0cccce0ff62c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F9 10436 bytes