Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d9c0a827fc2c90…

MALICIOUS

PDF

50.6 KB Created: 2020-08-29 23:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 808f7300b9ea3a8aad840cfa1233ecec SHA-1: 92aabf48f46443cf66b347487e58a64079792c43 SHA-256: 14d9c0a827fc2c9013df7f2bc3f714c39b54e13ba2a779e5904006b7796b5fda
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a digital painting tutorial. The ML classifier strongly flagged this PDF as malicious, suggesting a high likelihood of malicious intent.

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/wix?keyword=digital+painting+tutorial+photoshop+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/dd4472_763940ed23914b1e99bc35649c16c88e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a855fcab3217404f9446bcf89fbb67c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9a7583e1a184d6381f80099e6a53d5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_133a095451e74cd9ab17de8f591822b5.pdf
    • https://static.usrfiles.com/ugd/921909_c5ab0bc8b69446828fd8d4ef0533071f.pdf
    • https://static.usrfiles.com/ugd/b8c837_46ffed815959402a96d0ae1f5e3eee2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_00fd662ccaa04630affd15a124454021.pdf
    • https://static.usrfiles.com/ugd/cf14a4_c412c0d4ce5349d7acd857bfecc7b400.pdf
    • https://static.usrfiles.com/ugd/b8c837_8801ef0e5bec44738a311b88c4222d24.pdf
    • https://cdn.shopify.com/s/files/1/0435/0142/0696/files/14046650868.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/vugezagasasasod.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/homebase_plastic_dust_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/46659166521.pdf
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/19105725631.pdf
    • https://static.usrfiles.com/ugd/b4609a_e90233e679854e4fbf43e255be23f514.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecd132d8f7b74410aa1290ca0356c38c.pdf
    • https://static.usrfiles.com/ugd/e4ff69_5550e35739fb4f7e87077afb253fd0ba.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_off0000889e.bin
4d516089b4cc5d4bcbcf057a9d9d36fc84de0ffa462d8ee75fb71c7de931b4f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x889E 5300 bytes
font_01_sfnt_off00009a9b.bin
dddf00fbc6beb71354ad0ae7b7949c4ba19627effe0b92d06c9c347eaca7f084		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9B 10164 bytes

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