Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ce9c1102a5ec41…

MALICIOUS

PDF

48.3 KB Created: 2020-08-30 15:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5851069b4970bf9b921aaa48417f0761 SHA-1: e9d604ef96eb636eea6e5c5e40122f2d3a8eb49f SHA-256: 17ce9c1102a5ec41d75ca127021ba6da42fa81ad93c935f52a95b541427be1a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains keywords related to the malicious URL, suggesting a lure to download or view content. The presence of multiple external PDF links also indicates a potential link farm or content distribution strategy.

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=carmina+burana+score+pdf+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3b0c81_af77d6e332f9457fa3a8b88ff76f92b9.pdf
    • https://static.usrfiles.com/ugd/b48b60_6957de0e9d6246a0becc4dcfe5018f25.pdf
    • https://static.usrfiles.com/ugd/b8c837_1681138beec549f89663bdb1f729f914.pdf
    • https://static.usrfiles.com/ugd/b8c837_3631edaa9a6d474ca5ad62975c84114c.pdf
    • https://static.usrfiles.com/ugd/c0b427_a42b344faa8b4aae89e75364ec4d9a1f.pdf
    • https://cdn.shopify.com/s/files/1/0462/2942/2229/files/vocalise_rachmaninoff_cello.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/sda_hymnal_book.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7741/files/talarilevujinub.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/82284512408.pdf
    • https://cdn.shopify.com/s/files/1/0459/5839/8111/files/59379509762.pdf
    • https://cdn.shopify.com/s/files/1/0438/6075/4582/files/bajudevifu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/advaita_vedanta.pdf
    • https://cdn.shopify.com/s/files/1/0436/9498/1273/files/80857930666.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_off00007fce.bin
24e94d33590bdf6ddd48ff0c5a2083adc928c1dbb844f0b29b13e8b8ef18dd17
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCE 5316 bytes
font_01_sfnt_off000091bd.bin
fa8dd719a8b813fc1b3b990c1776b0038f78d82bd549093f125d602a9683470b
pdf-font-stream PDF embedded font (sfnt) at offset 0x91BD 10088 bytes