Malicious PDF — malware analysis report

Static analysis result for SHA-256 60758b33a97c5d14…

MALICIOUS

PDF

40.4 KB Created: 2020-08-26 01:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72d99fa8779da3cb949788033e004974 SHA-1: f5d3d38f628ec9fc9eec3940c43a178b7cc67f4c SHA-256: 60758b33a97c5d14807da31a28253994fcbf85e95f7fda3615eaa5ceccdd2123
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick the user into clicking it. The presence of numerous other PDF links indicates a potential link farm or SEO manipulation tactic. No scripts were extracted, but the overall structure and URL suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=nexus+mod+manager+wrong+username+or+password
    • http://files.xerobol.com/uploads/1/3/0/8/130874063/8ea115394.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7746/7288/files/3138386838.pdf
    • https://cdn.shopify.com/s/files/1/0431/4031/7350/files/adobe_reader_xi_not_printing.pdf
    • https://cdn.shopify.com/s/files/1/0437/3735/0305/files/good_food_guide_2020_leeds.pdf
    • https://cdn.shopify.com/s/files/1/0433/5304/7195/files/ridofowoxibeluwoxixi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1454/4808/files/golavutulenumajonanugigu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3136/3747/files/dagadari.pdf
    • https://cdn.shopify.com/s/files/1/0461/7702/6201/files/easl_hepatitis_b_guidelines_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/83367468052.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/doratomaralukenewokeledes.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/cerazette_mini_pill_information_leaflet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/takidiwataxetufonar.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4375/files/zamog.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_off00005f97.bin
552fcc98c42cfe989e2d31f264433ec1d7f1c86f14720f4001751102da78879c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F97 5376 bytes
font_01_sfnt_off000071e4.bin
d7f23bbb941bef14750f51a27e31f2db4c53de6920dcc31e7d7004b7a34d4d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E4 10204 bytes

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