Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f4bb132e96e0d5…

MALICIOUS

PDF

37.9 KB Created: 2020-08-29 22:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 696043eb5a061e8cc4e81153ee166649 SHA-1: df92ebce6fa893b8a797c860edd784376e205990 SHA-256: 35f4bb132e96e0d56547d1ac628e9cba008e6b1c5f3494fdae9dd79b5e8c1c6f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to academic subjects and includes the malicious URL. This suggests a phishing or social engineering attack aimed at directing users to malicious infrastructure.

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.ru/wix?keyword=9+s%25C4%25B1n%25C4%25B1f+almanca+konu+anlat%25C4%25B1m%25C4%25B1
    • https://static.usrfiles.com/ugd/227d0f_1848e2ada17642b2821bff0386239381.pdf
    • https://static.usrfiles.com/ugd/b8c837_88218eff24bf439d88857ad7bd5bbd51.pdf
    • https://static.usrfiles.com/ugd/b8c837_61aa954e9a2c416e8cf530f4bbf5c2ce.pdf
    • https://static.usrfiles.com/ugd/8b2c09_448018f781454180b141c0a80bde8587.pdf
    • https://static.usrfiles.com/ugd/b8c837_acdbb6ff422f4e5e854f4982dd587dd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d11b6247966490d9a33fece389ace91.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/environmental_law_jamie_benidickson.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/mizefulanedomofifewix.pdf
    • https://cdn.shopify.com/s/files/1/0435/7180/6366/files/82685708880.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/pdf_to_word_converter_apk_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0451/1688/3109/files/present_value_of_annuity_due_table.pdf
    • https://static.usrfiles.com/ugd/accd1f_ceea03592c0e4be2af9196f8f0fb22c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ec9cfcc516241eb91aaee5f9f0ea4fd.pdf
    • https://static.usrfiles.com/ugd/de65f7_c26568b9890a4c9fa647c85db9117e48.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c881a4cdd3a48caac3f3699895b18b5.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_off00005605.bin
edf38e7a2f97673dba7c90185ba4de37010fcc95632657358865c82c2cc44899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5605 5088 bytes
font_01_sfnt_off0000673f.bin
bc66309a1a774f17e1f6755195a2f67a1fdb0c2ef4a701e22fee1394db3d0cb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673F 10628 bytes

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