Malicious PDF — malware analysis report

Static analysis result for SHA-256 204c30ad15912068…

MALICIOUS

PDF

38.8 KB Created: 2020-09-01 07:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a1b407ab730869b0f4736504afe456e SHA-1: 0addf9ae9297cc2b9782a30a2e195d44fb53f5c6 SHA-256: 204c30ad15912068a7dc367e3e635de74bb35648c114e64b3c3ae9ea98bf137c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to a link farm hosted on static.usrfiles.com, which is flagged as a potential SEO manipulation tactic. One of the primary links, 'https://ttraff.cc/wix?keyword=kalakand+kaise+banate+hai+video', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a coordinated effort to distribute content through multiple linked documents.

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=kalakand+kaise+banate+hai+video
    • https://static.usrfiles.com/ugd/764aaa_3d1142c77908497da6c3800ad4c7cfe2.pdf
    • https://static.usrfiles.com/ugd/b8c837_81a30c15573c4d93b5b754f527edbcfe.pdf
    • https://static.usrfiles.com/ugd/a474dd_7c95cf9cde4b44aa953305d639e11df2.pdf
    • https://static.usrfiles.com/ugd/b8c837_c687637e74f74d27a788dbd22bed4b5b.pdf
    • https://static.usrfiles.com/ugd/16a96a_1f28ae57541544f486d9d85d83417827.pdf
    • https://static.usrfiles.com/ugd/fd3290_2990e4f4082549358c7234cebe8a13f0.pdf
    • https://static.usrfiles.com/ugd/a4d998_531c7aca6cbc49739889aabb3949533e.pdf
    • https://static.usrfiles.com/ugd/b98abb_c6996ae6a766496dbb97c87d48dac519.pdf
    • https://static.usrfiles.com/ugd/9e14ca_1c3a7fb501b54af8a835732f5a97313f.pdf
    • https://static.usrfiles.com/ugd/b8c837_25ac3e0f25bb42f1a1fc6501181d2e5f.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/najik.pdf
    • https://cdn.shopify.com/s/files/1/0435/9028/7517/files/blood_knot_by_athol_fugard_download.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_216ddac9c23b4829b0b79512d9806e15.pdf
    • https://static.usrfiles.com/ugd/d63aaf_64101fbf38ec47079ebeeaef85420940.pdf
    • https://static.usrfiles.com/ugd/3e5d97_32447301452b4f6f90ab3cd3e6cb64f0.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005022.bin
811d592e8b4bb61fbe2c9f961b238663ac334881809fdef5081c83f8051fefc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5022 4840 bytes
font_01_sfnt_off00006087.bin
59e00407e969550fd1437d204b24283d78c5c8198f2b0fb8072a8d1d5db4f98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 9316 bytes
font_02_sfnt_off00008033.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8033 4324 bytes

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