Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e7de420a07913f…

MALICIOUS

PDF

44.0 KB Created: 2020-09-09 03:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7902b1a318a38d2682d11b579b846388 SHA-1: 9804d158c7fffdb6c108147be3f43525f1aa405c SHA-256: 63e7de420a07913f7f21f06a97ed8f9b45eb752dd0fd86482b5a1a6c1fc67a51
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though partially corrupted, includes the URL 'https://ttraff.ru/wix?keyword=funny+questions+and+answers+jokes+in+telugu', which is flagged as malicious. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious sites.

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.ru/wix?keyword=funny+questions+and+answers+jokes+in+telugu In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bd8d0876f3d947519fe946455faedc36.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ade13_8696be9916904b05b86f13ae57adc16e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1b7c00_ea81c5622b5348cd941e3527189842f8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e1d12c_c7bb9aea9a394cbd97ea010827c15929.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e1ecea4fb2ef4005905eea90850c4860.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/913720_19c31d167f0742baae97297e10e5bee9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/36d413_73a17af8789949eea642e68793fa268b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f64db8_2768cbc7492d49dcba76d251e14c830d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/wikovunilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4612/4185/files/chapter_16_crossword_puzzle_answers_medical_terminology.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE4 5408 bytes
SHA-256: 077c67d35b6ac1db6579437232f83f8538c9c63bdead52487ffbe0a140d23d64
font_01_sfnt_off00008073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8073 10156 bytes
SHA-256: 8caa8d89010c7e29253cc30f5d7eae7b3ffe2ab571b174934e16a9f46381870a

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