Malicious PDF — malware analysis report

Static analysis result for SHA-256 b530fdcea530ddad…

MALICIOUS

PDF

46.4 KB Created: 2020-08-30 02:23:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f12f5a4614e628c5b0729e3dc03e515b SHA-1: 5ab486c05aa0ee88ec4bfd9d7c29d41141b80e01 SHA-256: b530fdcea530ddad881d1632608d64549b44b095601a2d879d3c3f66c5659886
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to `static.usrfiles.com`, which is identified as a link farm. The primary redirector link `https://ttraff.link/wix?keyword=honda+element+ex+p` is flagged as malicious. This indicates the document's purpose is to lure users into clicking malicious links, likely for phishing or malware delivery. No scripts were extracted, and the document body is heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.link/wix?keyword=honda+element+ex+p
    • https://static.usrfiles.com/ugd/33a2e4_c68e0f1c50d14ddda7b1bdca8ab30f3c.pdf
    • https://static.usrfiles.com/ugd/a59130_208441f288c64bbbbd927c7689d81a75.pdf
    • https://static.usrfiles.com/ugd/cd79e3_f5351d4204344be6a7778969dc2ba5a0.pdf
    • https://static.usrfiles.com/ugd/3f80ec_6e897939e05b425a84262ef74ce0a26e.pdf
    • https://cdn.shopify.com/s/files/1/0440/4301/0213/files/bible_quiz_questions_and_answers_from_matthew_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/academic_transcript_sample.pdf
    • https://static.usrfiles.com/ugd/576447_e397ed80d45245a8bf03644f447526e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_59d6a22c28e24ac4a61b320cde793385.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_off000062f6.bin
3a547c5c5fe3c71133a9116036015d0ffe916577115df9214a6b61331dcde9a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F6 4860 bytes
font_01_sfnt_off00007371.bin
02354c00f914c4ae502ac0da30ee7f0abd7ce13ea2502bcf71445d48b592e554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7371 10372 bytes
font_02_sfnt_off00009746.bin
ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9746 16060 bytes

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