Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b89e6e89b05470…

MALICIOUS

PDF

42.4 KB Created: 2020-09-08 17:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20c89074df6ff4c1c86e61f71b971225 SHA-1: e7cd795a2526bc8b549d683a409b6bc3980bb487 SHA-256: 41b89e6e89b054703c7c1409afb35430ee84499d2a6195f8e63db3c6058cc02e
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to a URL that includes 'gdpr policy template ireland'. This link is presented within the document body, suggesting a social engineering lure. The file also exhibits a PDF link farm heuristic, indicating it contains numerous external links, with the primary one leading to a Shopify domain. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=gdpr+policy+template+ireland
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokixud.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/lipowanejobisaxopaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5804/files/jagged_alliance_2_1._13.pdf
    • https://cdn.shopify.com/s/files/1/0436/7836/7897/files/028_stihl_super.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4889/files/39383983333.pdf
    • https://cdn.shopify.com/s/files/1/0431/3835/1255/files/new_cutting_edge_pre_intermediate_workbook.pdf
    • https://static.usrfiles.com/ugd/6d45f6_d17a6d67c126441b82caf9d614127fe2.pdf
    • https://static.usrfiles.com/ugd/857e61_d42bba0340fd4be5a43c68fda76f9a88.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/74702879355.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/busukubaxuki.pdf
    • https://cdn.shopify.com/s/files/1/0432/7967/9656/files/56132424244.pdf
    • https://cdn.shopify.com/s/files/1/0441/0834/9592/files/swot_diagram_template_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/4083396596.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_off00006968.bin
48d57c18ef9a4665675696ef0210ba31c568703a67d67939fa3af897da5aa4ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x6968 5176 bytes
font_01_sfnt_off00007afb.bin
2eae4206a7987ee678401ccaa468c69ad3421af8bb263215bdea209bd8ccb718
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFB 9868 bytes