Malicious PDF — malware analysis report

Static analysis result for SHA-256 9666b0cd85f6e6a0…

MALICIOUS

PDF

46.5 KB Created: 2020-08-31 04:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e6f27f8c3d5843c170f320fadd7f8ad SHA-1: 5bb2b16fc3944916e76d0e572243cefd9f7826ba SHA-256: 9666b0cd85f6e6a0a8aa71f4fa256688e06d42811dd12d9e1562bfdeee4816c7
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a download for 'hunger games mockingjay'. The document also contains a large number of links to static.usrfiles.com, likely part of a link farm to improve search engine ranking for malicious content. The presence of a visual download button lure further supports the malicious 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.
  • 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=download+hunger+games+mockingjay
    • https://static.usrfiles.com/ugd/b8c837_af64b28627cd4bec8224d9ecbae77549.pdf
    • https://static.usrfiles.com/ugd/93971e_ded82d4d746f4da88db64a42b1ad1b15.pdf
    • https://static.usrfiles.com/ugd/0c41e7_54c40acca8be46a88183ae14a66f2a7f.pdf
    • https://static.usrfiles.com/ugd/1e4819_88674126694a4eb8baee2676cf428332.pdf
    • https://static.usrfiles.com/ugd/de3d83_a98e927c51f041a08a1fffddb74fd153.pdf
    • https://static.usrfiles.com/ugd/eed56f_16b90205f5774fb2a73ce4af71523339.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_99aff6c0bd8d4faeb9c7615792b3e71b.pdf
    • https://static.usrfiles.com/ugd/c5d40f_323c6b5e263e4931be45c237b20596ce.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/10921739371.pdf
    • https://cdn.shopify.com/s/files/1/0437/1555/9573/files/at_t_router_settings.pdf
    • https://static.usrfiles.com/ugd/0adedf_840116b37fe244be93fb65b570dd0450.pdf
    • https://static.usrfiles.com/ugd/7198c1_0fd3ff4ee1b545a4883fe21b282835a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_71122891b4c64d9488dcbdef0f8eca2c.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_off00007484.bin
e5a4452570ff3c21933b992a7d37e77b4c261ad991ad4a0d622e21fe9b16b19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7484 5684 bytes
font_01_sfnt_off000087d0.bin
2ed1634e849a17ae13128be69fa79fddbdd69cedecedf49c32479612a96c2e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D0 11072 bytes

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