Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c349f2bda076ab…

MALICIOUS

PDF

46.6 KB Created: 2020-09-01 12:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b1c8d785fe2b5a7b3928014df5a8895 SHA-1: 69f36eca940fcc5096505b2f75d2402db396010b SHA-256: b8c349f2bda076ab23da04f660644bc027d4d24a43b81ee08990aa56faf12bc6
148 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to an 'Allianz overseas health insurance claim form' and includes the malicious URL, suggesting a phishing or scam lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are to benign-looking PDFs, likely to mask the malicious redirector.

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.me/wix?keyword=allianz+overseas+health+insurance+claim+form
    • https://static.usrfiles.com/ugd/097bd5_1b04e9f0d1904396a3828df347a99c93.pdf
    • https://static.usrfiles.com/ugd/73f3b0_b67b25939a8c4acdbf71fb206e72edbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a24bd9f1bc7496996d93b0c6e9612e2.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/auditors_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/5808/3493/files/chemistry_class_11_formula_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/diccionario_kaqchikel_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0465/0355/9320/files/broadsheet_and_tabloid_bbc_bitesize.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddce4081c1c34fd1aeaf8b5101b350bd.pdf
    • https://static.usrfiles.com/ugd/f09a9d_746818e33ef6472eac92480ca6c9f028.pdf
    • https://static.usrfiles.com/ugd/3ce946_c4bff4dbac7c438890addfd146be0609.pdf
    • https://static.usrfiles.com/ugd/837d34_70e11623ba6c48199c83c523d33ed5ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_c180215a48c347af82da553412fb9ca4.pdf
    • https://static.usrfiles.com/ugd/91e123_a16647807a8145b19444ce4258de9358.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c90b5d5b093420bb5424da4e9ecb507.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_off00006f61.bin
0cac2873594e3925c09edc7e16de600aff17ff67865c1398151f9ef66e7e85a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F61 5220 bytes
font_01_sfnt_off0000810b.bin
45bf0dc30a9f474c1c6c5a254a6cfbc677447d5c9d8b638dbdf58b81e4f8a7af
pdf-font-stream PDF embedded font (sfnt) at offset 0x810B 14280 bytes