Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb8449c82c592b3…

MALICIOUS

PDF

31.9 KB Created: 2020-08-31 12:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 419e47fe0a58f9acbe4545c3b414d213 SHA-1: ccac22747879de842d2ac73ebaa05c5a12292dc4 SHA-256: 5eb8449c82c592b3ef8729f9a52cab1703c7b781843e862cafbe37d732fc0034
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Sony sxrd owners manual'. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which are to benign-looking PDFs, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification.

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=sony+sxrd+owners+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/de60da_e03de5df0c37460a806743b4b096e76e.pdf
    • https://static.usrfiles.com/ugd/d4579c_746a12136bc043ad8f47ad9c281f3bda.pdf
    • https://static.usrfiles.com/ugd/cb4a18_4c761be07dc64347a5edbe6c7c269a35.pdf
    • https://static.usrfiles.com/ugd/0f5b72_904cb4c508ab4ab8bf8e58a23a50acb8.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d9df525fec94099a8c97dcaba23c6f5.pdf
    • https://cdn.shopify.com/s/files/1/0434/6091/9446/files/71779111098.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/breast_and_ovarian_cancer_screening_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0460/1420/2023/files/tiny_archers_apk_unlimited_gems.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/kovobabizovepoberite.pdf
    • https://cdn.shopify.com/s/files/1/0437/9354/7426/files/conceptual_framework_for_financial_reporting_2018_revised.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/sawizuwafexiko.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/thompson_performance_powerblast_plate_review.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/misetoziwonegawozabo.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_off000042de.bin
85d1fee29a2448968c6721cde4585a7008f865b3c9ce8fd1404dedf576c169bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42DE 5336 bytes
font_01_sfnt_off00005500.bin
08994fe28956bd7758ed4e1f58e2f2a49e6b626f97784dd60df7adc39984644c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5500 8876 bytes

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