Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b19cea346286caa…

MALICIOUS

PDF

47.9 KB Created: 2020-09-03 20:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 996284bae9bf4102f67efd3408606e55 SHA-1: 767e2fd30a6b208c1589376d242ff021f0bed778 SHA-256: 2b19cea346286caa12c66ff364191cc3ac842a7b06b015bc5191020e733281c7
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. This suggests the PDF is designed to redirect users to malicious content, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.club/wix?keyword=smoke+detector+circuit+pdf
    • https://cdn.shopify.com/s/files/1/0440/9081/8712/files/family_chore_schedule_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/44238443872.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/carte_du_ciel_gratuite_astronomie.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4969/files/fimovenokipatozom.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/weight_gain_workout_plan_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0436/5818/2809/files/list_of_collective_nouns_pdf_file.pdf
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/biostatistical_analysis_jerrold_h._zar_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/coroners_act_2020.pdf
    • https://static.usrfiles.com/ugd/c0a468_d5a285d38c7f4ec4b87a64be58b83636.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab7b918c0fa84a0a8ba6ecca5dad7653.pdf
    • https://static.usrfiles.com/ugd/5af86b_26c9dba04baa4d7dadcb2e01022ddb12.pdf
    • https://static.usrfiles.com/ugd/b916f4_5ffd11cb61e44a48a36c93b282dca20e.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9947/files/96805768511.pdf
    • https://cdn.shopify.com/s/files/1/0436/9917/5579/files/wikoxufekudinaluj.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_off0000715d.bin
9d483eb0f89a7802a4c33351ed31ec34d9e18feb3a53a49df0a0e0a25ebf5414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715D 4824 bytes
font_01_sfnt_off000081ce.bin
4ad71e75b7871354e1101dfc1c4436fdf42379adf43895acdbbe927f864e0ecb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81CE 10212 bytes
font_02_sfnt_off0000a4c0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4C0 4324 bytes

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