Malicious PDF — malware analysis report

Static analysis result for SHA-256 b012083019ba3aca…

MALICIOUS

PDF

41.7 KB Created: 2020-09-05 22:03:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b8ffabf04e9703687e91a8219f1a303 SHA-1: 80375a4c8b88cf2488aed73d44dd9024bc5fb1c0 SHA-256: b012083019ba3acab62381a839816f60e1ab2ae3cd0a922e5123a8cde56953df
152 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector. The document body, though heavily obfuscated, also contains the URL that is used to redirect the user. The ML classifier strongly indicated maliciousness. The primary attack vector appears to be luring the user to a malicious site via the embedded link.

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.club/pify?keyword=pictionary+ideas+pdf
    • https://static.usrfiles.com/ugd/6f58fb_049c7a101dbc4b57a43320cb1a2a5764.pdf
    • https://static.usrfiles.com/ugd/60933b_3e4f336c49ac4b438339e821b5f30834.pdf
    • https://static.usrfiles.com/ugd/39a0fd_97b6d39f44cb41da89d2729154682c1b.pdf
    • https://static.usrfiles.com/ugd/868401_43deba4303b4484598f9c2e36be04252.pdf
    • https://static.usrfiles.com/ugd/c1c462_e5406d57b7f44777aac287cd758fbccc.pdf
    • https://static.usrfiles.com/ugd/77eba6_e0ca03057c43448ea8d3f7b3cc128110.pdf
    • https://static.usrfiles.com/ugd/39a0fd_d058c794b3f84adea705122b883f555e.pdf
    • https://static.usrfiles.com/ugd/b27199_60e66d2d2e1349ee8cd02ba6da9d4b12.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/72034573673.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5891/files/51237253403.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/baluvepesiwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/66730423069.pdf
    • https://cdn.shopify.com/s/files/1/0464/6492/5854/files/26836258284.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_off000065e0.bin
772a2dd5d6309b32dd64c6059496ab225b9a7eca8611119b2834012ddb738967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E0 5220 bytes
font_01_sfnt_off000077bb.bin
70273ece231a6650b6cc1287bfa0199122dd5b9ff057c54c800d3707386a2bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BB 10060 bytes

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