Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b39cd1ac4c8b12…

MALICIOUS

PDF

40.9 KB Created: 2020-09-01 02:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdd417d653bca8576e97974d62522e31 SHA-1: 41e367add5dae6b22a01db94d00cb99dc077b82d SHA-256: 92b39cd1ac4c8b12f8334ada0c15a3ca935d9cf941e26bb25fd1fd799e96a0b9
160 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector. The document body explicitly mentions 'Anydesk license key free' and includes the malicious redirector URL, indicating a lure to download potentially unwanted or malicious software disguised as a free license. The heuristic 'SE_REMOTE_SUPPORT_LURE' confirms this intent.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=anydesk+license+key+free
    • https://cdn.shopify.com/s/files/1/0430/6544/2455/files/11830396748.pdf
    • https://cdn.shopify.com/s/files/1/0463/3287/0817/files/vimifij.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/mapudikidofilotupodopu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/torogapegipilotajo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0746/files/47678904534.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/durolojepisipiwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/vikekowejoduwotarutar.pdf
    • https://cdn.shopify.com/s/files/1/0435/4254/4533/files/ximaxuvafali.pdf
    • https://static.usrfiles.com/ugd/1decf9_7359220e4f844f3796f6bff6ecce8651.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c40d98904134ebeb83011c833cda62f.pdf
    • https://static.usrfiles.com/ugd/3826db_d966299c6e994a9fb5fb652f9ed9b0ce.pdf
    • https://static.usrfiles.com/ugd/9e41f0_4eb66608fcc442038d865dc6f1053c10.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2ee0cc9306f4fedadae902f9e2f56ee.pdf
    • https://static.usrfiles.com/ugd/74a852_e35dc4ab94724798802f6236f9c5e929.pdf
    • https://static.usrfiles.com/ugd/21e6f2_54e0c2ccdc2745db9a4e79845d6325d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe7949643807437c89404e23c6aef9fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bf4c146d25743d1b72ffe676366da53.pdf
    • https://static.usrfiles.com/ugd/9219f8_efa3db1ed7ed4991b3858580b0ea3596.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_off000062c7.bin
6be65717c44b0fd6c0c174e7ee996e6c7cfa6a0808513904f997df8221721284
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 4960 bytes
font_01_sfnt_off000073cb.bin
4182da25e8fc41721354d8be9d024ae43ab121db1a74b3fc469226941d7bb63c
pdf-font-stream PDF embedded font (sfnt) at offset 0x73CB 10324 bytes