Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99b320fb7f9be9c…

MALICIOUS

PDF

44.0 KB Created: 2020-08-31 13:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b68e7c3ecbec33edf91724fac5a27c0 SHA-1: 4eb264d1d042351888b05d016916514ddff4e1f9 SHA-256: f99b320fb7f9be9c441b00e5b8e85f86e48f0ce939b27af3cc332f351e402897
128 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, contains text suggesting a lure for 'Ibps guide september current affairs quiz' and includes a call-to-action phrase, aligning with the 'SE_DOWNLOAD_BUTTON' finding. The presence of a link farm ('PDF_SEO_LINK_FARM') further indicates a malicious workflow designed to distribute harmful content.

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.club/wix?keyword=ibps+guide+september+current+affairs+quiz
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/68851772533.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1853/files/gate_2020_result_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8273/6031/files/recette_thermomix_apritif_dinatoire.pdf
    • https://cdn.shopify.com/s/files/1/0463/0862/2493/files/gmat_official_guide_2019_error_log.pdf
    • https://static.usrfiles.com/ugd/e2f197_f8b388df797644ebae76ff0319f15152.pdf
    • https://static.usrfiles.com/ugd/fb5067_6aa1867f1c8e4b968ef639a00649bdd9.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_0fc83ba9ecde4bf095d4f8739a652920.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa1f752720434b9f9ac4a1fb941376a8.pdf
    • https://static.usrfiles.com/ugd/3bcfef_6f0d39680385429bac4370fc9afcdfe0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b738e5dffafc4076b03d0937c32119c3.pdf
    • https://static.usrfiles.com/ugd/b88e3d_37d5f529383e473cb8bdf5cdc2f4ed06.pdf
    • https://static.usrfiles.com/ugd/18f527_70ef310a6d25459aba554316ea89e769.pdf
    • https://static.usrfiles.com/ugd/cc14e4_992e59602d604b27b2ddfca8b6d32af8.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_off00006be9.bin
bc8f55baeea454450e6283b0f11ffcbef7e01697cb2c62ec6714893c51490767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE9 5696 bytes
font_01_sfnt_off00007f2e.bin
b235c31393469130490e449fdff6cb2d0329ba7ba6f78df24382c9399697b312		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2E 10464 bytes

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