Malicious PDF — malware analysis report

Static analysis result for SHA-256 318ff977efdcd752…

MALICIOUS

PDF

48.7 KB Created: 2020-09-04 10:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43ce6cd959b5d6d6f6529d1a9b62a24d SHA-1: 5d9738a56d492863379e420b82d83494b1e37c03 SHA-256: 318ff977efdcd752c896216c4dd6259a8c52c7a1293cb80056cf3f364f018211
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is the primary attack vector. It also exhibits characteristics of a link farm, attempting to disguise malicious content among numerous benign-looking links. No scripts were extracted from this sample, but the embedded URL is the main indicator of malicious intent, likely leading to a phishing or malware download site.

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.club/wix?keyword=renaissance+period+architecture+pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/probability_distribution_questions_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/39732369506.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9127/files/research_administration_and_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/suzodoraxabi.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/lifujuvimotinusawumi.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d679de417aa405f91780757c8d963ec.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4889/files/21454763678.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/biwuxetakofikeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/4031/6319/files/wamurumuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/tuguzufazavaliri.pdf
    • https://static.usrfiles.com/ugd/ba3095_8738f5756f08450cb7e7e073f220b8e0.pdf
    • https://static.usrfiles.com/ugd/b926a8_cd477d95df6f409e967b4436e808fef4.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_off000082d4.bin
224fb6b69a52a96dd22a692301af8c7bad3ad0dac1de767930a540f4423c5d7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D4 5220 bytes
font_01_sfnt_off00009491.bin
2f376c33b2c0928fa6b2b3e7713b60bad0d6711614e1cf41d0c2d278befaf23c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9491 9876 bytes

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