Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4fe50f42964be2…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 04:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 716419879a3feb169d946e0c66d2e2b3 SHA-1: 4952ab5da55b499a03939255142f06c79ccf88e5 SHA-256: 4b4fe50f42964be26d499334d93d697fc329181d62d2abfe307c39c0c08e3d30
128 Risk Score

Malware Insights

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

The PDF file contains a lure for a 'bikeman performance clutch kit install' and includes a call-to-action button. It embeds numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/wix?keyword=bikeman+performance+clutch+kit+install'. The presence of a link farm and a malicious redirector indicates a phishing or scam attempt designed to lead the user to a harmful site.

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.ru/wix?keyword=bikeman+performance+clutch+kit+install
    • https://static.usrfiles.com/ugd/b8c837_e6666bf03ee0493fb4b4ca5e2b13e010.pdf
    • https://static.usrfiles.com/ugd/9421c8_a10d8bef092c4f36adc9c4a26b749ca6.pdf
    • https://static.usrfiles.com/ugd/8127dd_fbd72a7493794235b0b0ab878c272acf.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce6eef643ae1473992e4e40a475ccbc1.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/48797638341.pdf
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/65780252703.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/darunexakilimozupefadasi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/article_about_current_issues_in_philippine_education.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/gun_mayhem_1_unblocked.pdf
    • https://static.usrfiles.com/ugd/921909_630a077c5a1c4f1c9d3f9c2fab7c4d12.pdf
    • https://static.usrfiles.com/ugd/b8c837_13a0100fd7514212b070df1b1c882c39.pdf
    • https://static.usrfiles.com/ugd/271e65_21600b2ce5a24e028ab688bd6996d233.pdf
    • https://static.usrfiles.com/ugd/be19e1_6baecb9eac1144ba93766838f2a509c2.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_off0000602f.bin
4cf906a81c9f09de8476a8f79f4ad43a96cfec623629872d14f613a7e6d2faf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 5368 bytes
font_01_sfnt_off0000723f.bin
ddf4d76b703c23439348461fbeb7d0ae704f455e39678281e31a155e82c1a90b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723F 10092 bytes

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