Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0e4caab5762032…

MALICIOUS

PDF

65.4 KB Created: 2020-09-02 11:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdd756607f852c266a5147f8d70bf49f SHA-1: 168dc4893773642b0e4a08d92fd34bb5c286b6b9 SHA-256: 0a0e4caab576203207c093ea0f61e6c288db02993b97aa98565871965d35b876
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm, suggesting an attempt to drive traffic to potentially malicious content. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=nfl+week+9+picks+bleacher+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/510a18_e617fa7342084cf0bebefa8446cd1ff6.pdf
    • https://static.usrfiles.com/ugd/dcfb95_1c5f5bc958744bfb8981beece40f6609.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_baaa7efe64fe4d6ca8a462f6d1827be7.pdf
    • https://static.usrfiles.com/ugd/b8c837_356757b73cb642b19deb0bff8ac64bd6.pdf
    • https://static.usrfiles.com/ugd/d54300_cbf8412dced043408894b4cc896c2a61.pdf
    • https://static.usrfiles.com/ugd/b11f6d_8b694e5d7f6745ddbb2a801a07d70463.pdf
    • https://static.usrfiles.com/ugd/e73fea_0aa17e37b1ec45a38c865d353063f9f0.pdf
    • https://static.usrfiles.com/ugd/b4f0c6_9c353b9a4fd745ccafd94cc8e8644c87.pdf
    • https://static.usrfiles.com/ugd/0779a3_784b7c8310a34b13a86c17360a81aa96.pdf
    • https://static.usrfiles.com/ugd/db93e9_faab462184494e8fb71b9c02a9bf792b.pdf
    • https://static.usrfiles.com/ugd/6846fe_c17c9672db834bb28bcb0130a45cb48a.pdf
    • https://static.usrfiles.com/ugd/a2d007_0cea68858bc74b02841efaad167e9b6e.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/libogogoxazib.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/streamlabs_tip_jar.pdf
    • https://cdn.shopify.com/s/files/1/0432/4311/0564/files/zuven.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/fomuxesejixiditirufevo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/34190566038.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_off0000c1de.bin
8fcfbd20ed66bfe26e3637c1814dcd757735207f6cf33eb84b960d7f7aa6eeac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DE 5524 bytes
font_01_sfnt_off0000d4b9.bin
ae0958ee141131a0fdd82012ea8b96fefe82b492bd6cc2fa6aeffcb73dbb788a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B9 10488 bytes

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