Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1b9e5080667cb8…

MALICIOUS

PDF

33.9 KB Created: 2020-08-19 03:44:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dfa414f9e60abddfd4b2745df3b6cb1 SHA-1: e7cbca716e512f92112086ba8ecbf399ed538e89 SHA-256: ec1b9e5080667cb8c9ec9065107d2eff32451d0d410797804e992941eff186a3
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search engine results, with the primary link leading to a known malicious redirector. The document body and embedded links suggest a lure related to educational materials, specifically a 'bbc english grammar book free'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary redirector URL.

Heuristics 3

  • 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.
  • 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/pify?keyword=bbc+english+grammar+book+free
    • http://files.stirrednotshakencincy.com/uploads/1/3/1/4/131407148/lixawapalotizel.pdf
    • http://merov.cincitherapy.com/uploads/1/3/1/4/131454373/jewuvekobafotawinu.pdf
    • http://files.northparentpress.com/uploads/1/3/1/3/131379530/bedubit.pdf
    • http://files.thriveslc.org/uploads/1/3/2/7/132740586/7784840.pdf
    • http://files.nanarobindesigns.com/uploads/1/3/1/3/131384436/fe27f496eb77b2b.pdf
    • https://cdn.shopify.com/s/files/1/0434/3817/8470/files/parallel_line_slope_intercept_form_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2749/files/90563171986.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/17665110760.pdf
    • https://cdn.shopify.com/s/files/1/0440/5598/6326/files/48830276092.pdf
    • https://cdn.shopify.com/s/files/1/0436/1093/1358/files/jevojenipagurogekiluwofi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/tobezatom.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6589/files/43967034114.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/greenhouse_gases_file.pdf
    • https://cdn.shopify.com/s/files/1/0429/2155/8183/files/manual_j_calculation_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2746/files/57509412961.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/94841339627.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_off000046ea.bin
180718ba004db9230de7acc9ad201981a349adecae53c040ef587ac687a13698		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46EA 5548 bytes
font_01_sfnt_off0000599d.bin
25edbe76f31c21601f72a49a67765d0ade30923b1479d8df0cd98e0bbf372f46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x599D 9832 bytes

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