Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e9c68ff98ebc2a…

MALICIOUS

PDF

42.4 KB Created: 2020-08-06 05:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2972471f6a0b02f34b15881328742b43 SHA-1: ff68256e4a857608641ba7be078ff224c54386d7 SHA-256: 84e9c68ff98ebc2a4c9a7f644918707362b32039cbbef6eb619d18d0e1d65072
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the intent is to redirect the user to a harmful site, likely for phishing or malware distribution.

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.cc/pify?keyword=agreement+on+safeguards+wto+pdf
    • http://files.thearttherapystudioithaca.com/uploads/1/3/2/6/132681670/471502a7600.pdf
    • http://files.schlichamericanlitghs.com/uploads/1/3/0/8/130874496/tatusivi.pdf
    • http://files.artspace613.org/uploads/1/3/0/7/130738765/vasilakakolozixolori.pdf
    • http://files.digitalsimon.com/uploads/1/3/0/7/130775997/1095754.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/teknik_konseling_behavioristik.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6630/files/49754262236.pdf
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/gaselisadifesupuza.pdf
    • https://cdn.shopify.com/s/files/1/0439/4031/5294/files/rajevun.pdf
    • https://cdn.shopify.com/s/files/1/0436/6244/2646/files/92356210523.pdf
    • https://cdn.shopify.com/s/files/1/0433/2371/9845/files/42390691687.pdf
    • https://cdn.shopify.com/s/files/1/0438/3804/6365/files/classroom_rules_for_preschoolers_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/8045517896.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/zataxopo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lawup.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/55971113243.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6789/files/northwell_health_intranet.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_off00006734.bin
32cc76c3dda178f7b535d2eec04f1e529cc9a7ddcd711f18e6e9720bd2afe66a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6734 5408 bytes
font_01_sfnt_off0000799a.bin
0e07120e791e593f8055af286f6667d339d961f4116375aceba99c903c3c8b9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x799A 10476 bytes