Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d31844ea951a11…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 00:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f3964ab71033fc9db589cd2dbeeedc4 SHA-1: d89c6f1988b8871a966b1d91d727628fa628358a SHA-256: c5d31844ea951a11d4910357bfb5f1387723ca5af532e6751127b208fbf1ffb7
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, many pointing to Shopify domains, suggesting an attempt to obscure the malicious destination. The presence of a 'download button' lure further supports the malicious intent. The primary malicious IOC is the redirector URL.

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.cc/wix?keyword=kese+jiunga+kese+mp3
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/terabotevuwakidabopalajaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/practical_boiler_water_treatment_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0633/files/zoloron.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/dovera.pdf
    • https://static.usrfiles.com/ugd/93c935_ea93dfb68e3b4a28bb5e37dc0c629265.pdf
    • https://static.usrfiles.com/ugd/5a1791_de46242aad4b4826b2bd8fb12324ba9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa28568802844c82bf3acaf25de470f5.pdf
    • https://static.usrfiles.com/ugd/2c8d66_eeeff31c5ec54cb6849f3511a6e2472c.pdf
    • https://static.usrfiles.com/ugd/d775a9_46c8f72d0f63418babee6b173a62ec75.pdf
    • https://cdn.shopify.com/s/files/1/0448/4418/7805/files/metabolic_disorders_of_urea_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/fovamufuwofigejofovuxujet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44368867506.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e8c.bin
dae591e73ca923ebff6e3fbeb31d8532076b732ac056f32baddd261ab2898cfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E8C 4976 bytes
font_01_sfnt_off00005f63.bin
e7f4309c035ed24fd0bd664f5a57efe2f55782c921cef03b474c4bc47fcdbf17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F63 13780 bytes
font_02_sfnt_off00008a50.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A50 4324 bytes

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