Malicious PDF — malware analysis report

Static analysis result for SHA-256 12776a54f6ac15f3…

MALICIOUS

PDF

37.0 KB Created: 2020-08-29 03:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c3d052abd01f22ee885a1b56e1b4f54 SHA-1: 65e1cbe7a9c0baad67411da9be336226b4d20292 SHA-256: 12776a54f6ac15f3563cc70cab320204813fdaa6e229db394a7504ad076ed270
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a known malicious URL, indicating a phishing or redirection attempt. The document body, though heavily obfuscated, contains text related to "latin lover" and the malicious URL, suggesting a lure. The presence of numerous external PDF links, many hosted on Shopify, further supports the idea of a link farm or redirection scheme designed to obscure the final malicious destination.

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=como+ser+un+latin+lover+mega
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4297/1553/files/repuduluwikal.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/70528145139.pdf
    • https://cdn.shopify.com/s/files/1/0431/5217/9364/files/pidoxifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1688/files/57697636573.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/c_programming_language_basics_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/latex_template_for_elsevier_journals.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/92207398599.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/75713009189.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/vojevaruropelufapegiju.pdf
    • https://static.usrfiles.com/ugd/b8c837_766294f9829343e69533363d1e0b2827.pdf
    • https://static.usrfiles.com/ugd/b8c837_a05a740ae8084971922c5bc4ebafd620.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae6b6a3abb8f4e8797b7cd5b917673a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_70b90524175f4fe5af076053114ba32e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac47ebecbe044917b861c33bf9691860.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cf9f4b5e50c407bb75fc8dc116f831f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2f713215ac4b29b4c1745a7775e7a4.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_off00005307.bin
a8efbe415bf3e8e20b59b5281fa72ce86d6522d6e8da924abb0ad6c29d438240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5307 4972 bytes
font_01_sfnt_off000063db.bin
9fd4f415926f892319640575e795e2d28a7b37cdb2d8215927888571c330361d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63DB 10464 bytes

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