Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc9ad056172a0b4…

MALICIOUS

PDF

51.1 KB Created: 2020-09-04 06:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc75386fb94d12a2e0157ec7e54e558a SHA-1: 7a050bc3e37388227e82ac21b190ab08d218ee9c SHA-256: 6dc9ad056172a0b49369b054e5af54389a265bd88ed7d7cfb176b7c112d3f836
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to a song and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, likely part of a link farm designed to improve search engine ranking for malicious content.

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/wix?keyword=banjara+song+ing+come
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/gitow.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/medupawidogukabew.pdf
    • https://cdn.shopify.com/s/files/1/0447/8432/0661/files/jebufetul.pdf
    • https://static.usrfiles.com/ugd/23e9be_2d93ce6c7a9043c48921d3c60d46168f.pdf
    • https://static.usrfiles.com/ugd/9a242c_e0e0c8a58cc64e859f8be74932c121b7.pdf
    • https://static.usrfiles.com/ugd/3c2e2e_bce86c60df97443e9da80062870659f4.pdf
    • https://static.usrfiles.com/ugd/957c7b_305ca2dd89b64ed7aa1242fd1a9b8cc8.pdf
    • https://static.usrfiles.com/ugd/c5d40f_fc0ad810821245cf8d49ef576045cd84.pdf
    • https://static.usrfiles.com/ugd/682d1c_9899772bf3ce49c0b65f43432cd1b064.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7ad1b28489c4ecb8a9d12318e518c9b.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_off000080c3.bin
b3655db664a8e9588999db2f8c3083509168567cb7bfa18c0958c346bf06bd87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C3 5212 bytes
font_01_sfnt_off00009275.bin
9d4d3adc9b392065201b1fcd45c5f9b8d24207c9914181b2d2eab235c3a8113b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9275 14728 bytes

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