Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd9f8eeba1da628…

MALICIOUS

PDF

39.1 KB Created: 2020-08-30 23:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a332f1e0c71853a41804e895953606 SHA-1: 2100b18977fd151ec29b01f7799b4deda4c07c26 SHA-256: 7bd9f8eeba1da628ca9c089798ecf02b5d384bb605532dd2c192152d0a1c004f
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=thompson+genetica+8+edicion+pdf'. The document body, though heavily obfuscated, also contains this URL. The presence of a "download button" heuristic further supports the lure-based attack pattern. The file is identified as a PDF and generated by wkhtmltopdf, suggesting it was likely created to host malicious links.

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=thompson+genetica+8+edicion+pdf
    • https://cdn.shopify.com/s/files/1/0431/2947/1130/files/sakojagiwedapadotekefub.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/sinijatigaximugalufukifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7565/7110/files/factores_sociales_que_influyen_en_la_alimentacion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6259/9585/files/au_nord_c_tait_les_corons_paroles.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/motudu.pdf
    • https://static.usrfiles.com/ugd/b8c837_274da813579f432e9db73af3b685073c.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ba8fa64ff2146f39c01d83a7ed68bbf.pdf
    • https://static.usrfiles.com/ugd/b8c837_311f7dd521204dd58dfe8bf5f63acd8d.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_0d7b702902fd4674a6abfbe39233e37d.pdf
    • https://static.usrfiles.com/ugd/b8c837_512ea1efca3748809b0548294fbd1bd7.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed90f2a3be8542cda28f486d9cbf2f16.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed6b4b5cd7af4c21a6159f72421b3196.pdf
    • https://static.usrfiles.com/ugd/b8c837_5efa5754b4034f06a5226a533c3911f5.pdf
    • https://static.usrfiles.com/ugd/ee4a13_9968ab9e2e5e43c59fb97d4cac08b4fd.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/51103536273.pdf
    • https://cdn.shopify.com/s/files/1/0437/7001/9994/files/review_sheet_exercise_9_the_axial_skeleton_answer_key.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_off00005b52.bin
2befdd31a3cbcbd6a2f7a9767eccc8aa5c997b366f5003317a80cccd62211ece
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B52 5584 bytes
font_01_sfnt_off00006e31.bin
9ae146da8436719d1d9ab5d68d742890b1f832fc700d2f4867a8f7161ecf38e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E31 9932 bytes