Malicious PDF — malware analysis report

Static analysis result for SHA-256 924f1f586c0363a3…

MALICIOUS

PDF

47.7 KB Created: 2020-08-30 03:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06b48d248887d92d42e96e6478c01ad0 SHA-1: 949e924760fe4cd80226b31b0d24c33676500bf6 SHA-256: 924f1f586c0363a30517e0ae495d83c9f86e91b49636546141f553f7f4d8980d
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary malicious URL being https://ttraff.cc/wix?keyword=shark+rotator+professional+vacuum. This URL is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same malicious URL and other benign-looking PDF links, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious verdict.

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.cc/wix?keyword=shark+rotator+professional+vacuum
    • https://static.usrfiles.com/ugd/2813e2_f1cce822a19c42168e2728c00d0a674a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffc0bdad52cc469999d2b6e070ec88c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_e09d73e2a4914e6aa6b5bb79038e20ed.pdf
    • https://static.usrfiles.com/ugd/efb3f0_eeaf05c61efe4c55b8b3927fd4385cc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_04c12010efbb47888fa56a01f3ba7b10.pdf
    • https://cdn.shopify.com/s/files/1/0433/9220/4950/files/moxugap.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1606/files/kibekuletifubanopunewo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/tell_me_about_yourself_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/amd_radeon_tm_r5_m330_driver.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/18270797820.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/99450466573.pdf
    • https://cdn.shopify.com/s/files/1/0430/8605/3527/files/37002738626.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/5993/files/zifiwapu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/53452146626.pdf
    • https://cdn.shopify.com/s/files/1/0450/3748/6238/files/original_hebrew_bible_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9269/files/yamla_pagla_deewana_film_all_song.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/77714818452.pdf
    • https://cdn.shopify.com/s/files/1/0431/0027/4845/files/lorixilegukifijeg.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_off00007a23.bin
e14b6382a56f013a64b91f60cd2034077dfa07a5ee651db6e6b13f5f4ca3ff35
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A23 5480 bytes
font_01_sfnt_off00008ca3.bin
310de6eba040d0b2ce9a42e76a4eddfc8b88f3ab7f83699d8ae734cbcb710091
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA3 10676 bytes