Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43440f14ab82553…

MALICIOUS

PDF

69.4 KB Created: 2020-08-14 19:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bb8864eff375f37a0346bb6cb7a0641 SHA-1: 653199d5db33db12f7f5820afde0a5c54acefa9e SHA-256: c43440f14ab8255374ea6deea84683032e5b26d69df7aca1eed1bb90126b1ef5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains numerous embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered this heuristic. The presence of a link farm and a malicious redirector suggests a phishing or malware distribution attempt. No scripts were extracted, limiting the analysis of direct execution capabilities.

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/wb?keyword=osteologia%20y%20odontologia%20forense%20pdf
    • http://files.ladyvetanimalhospital.com/uploads/1/3/2/8/132814166/gekom.pdf
    • https://cdn.shopify.com/s/files/1/0431/0692/6754/files/38204669301.pdf
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/anatomy_and_physiology_workbook_for_dummies_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/4901/5706/files/4172189588.pdf
    • https://cdn.shopify.com/s/files/1/0432/5552/9640/files/how_stress_affects_mental_health.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40573574370.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/porovurujapiganipuzul.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/lasedifelegudulesajexik.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/jigabufezawiroro.pdf
    • https://cdn.shopify.com/s/files/1/0431/4864/0418/files/21593908222.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/rivolevezoles.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9064/files/35100419777.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_off0000d4a7.bin
01bc2382f9b852a6498b17037bdc4ea0241978eb51bae89241ff751f6e4be4a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A7 5336 bytes
font_01_sfnt_off0000e6e2.bin
8fcc33a7ea52c950b2b0d2e4a24b009e0d00620a76c2f55065a53cac2762c85f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E2 10008 bytes

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