Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f93154777d0e8c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-31 01:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d659c5f57bf5ae1323bf7a56185d2e45 SHA-1: dd39ab28a6c31610e59e58ff9649c8fd34aa967d SHA-256: 74f93154777d0e8c81e52efb04e2e533f40393cfcef58820fe9d8fb3fa4779b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, includes text suggesting a 'direction to pay form template', indicating a phishing or scam lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm used to distribute malicious content or improve SEO for malicious sites.

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.ru/wix?keyword=direction+to+pay+form+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/wiwijerobi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/23970059426.pdf
    • https://cdn.shopify.com/s/files/1/0453/5540/1371/files/cuddl_duds_flannel_sheets_twin.pdf
    • https://cdn.shopify.com/s/files/1/0436/1738/6659/files/70971392331.pdf
    • https://cdn.shopify.com/s/files/1/0455/3582/1989/files/gana_baja_de_video.pdf
    • https://cdn.shopify.com/s/files/1/0458/2866/9603/files/tesla_case_study_strategic_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/9583/4276/files/durifepuzaxalinezovuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/17343661944.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4518/files/kubalibowe.pdf
    • https://static.usrfiles.com/ugd/704566_b005a54c17e94df68664b9d43f496c50.pdf
    • https://static.usrfiles.com/ugd/b8c837_57d8345793724ebf8e47b8b2e268f02e.pdf
    • https://static.usrfiles.com/ugd/b8c837_02dd6ffa13a441a082f6696bee891411.pdf
    • https://static.usrfiles.com/ugd/c12414_26b3413b4e624488a7a15b08e86109ea.pdf
    • https://static.usrfiles.com/ugd/d216cb_6af49aca3236434da39c290bb5942eda.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d9.bin
c1fcdfe887f84c069b96130b59892f6c97b99415d01a7d322416525aa7f1305f
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D9 5084 bytes
font_01_sfnt_off00007817.bin
5ed19034ff68bd3c7dd79b4296d51b5b0a1aa01fc35434b221a6112b246034c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7817 10296 bytes