Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8a5d30a4c5f387…

MALICIOUS

PDF

54.5 KB Created: 2020-08-29 15:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f1fe1b59a8c8738142ed83c3c5a1afe SHA-1: 5f34c3bf0dfb17f4a8024c0d5e3cdc5332961ed5 SHA-256: 5a8a5d30a4c5f387e943b2a9ba46c3e737ab6fbe24e68cd4b0122a62fbd6844a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'forge of the giant god pdf'. The presence of numerous other PDF links suggests a link farm or SEO poisoning attempt to distribute 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.ru/wix?keyword=forge+of+the+giant+god+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/kazarejevijukeba.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/pofuvawex.pdf
    • https://cdn.shopify.com/s/files/1/0440/3917/6342/files/60838598717.pdf
    • https://cdn.shopify.com/s/files/1/0434/5079/4145/files/26929212921.pdf
    • https://cdn.shopify.com/s/files/1/0436/7895/7718/files/49046904911.pdf
    • https://static.usrfiles.com/ugd/b8c837_953abfedc7f847508b178af1a1249c75.pdf
    • https://cdn.shopify.com/s/files/1/0433/9607/1578/files/26858884235.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/agglutination_tests_immunology.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/78591386603.pdf
    • https://cdn.shopify.com/s/files/1/0434/8415/1974/files/dragons_dogma_dark_arisen_vocations.pdf
    • https://static.usrfiles.com/ugd/b8c837_63db309ca489412aae57794db5742f13.pdf
    • https://static.usrfiles.com/ugd/b8c837_3266973cf40d4bb08be5c98beabdb23c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3adabb3da63441b94fc10baf91845ec.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_off00009987.bin
523655fa66945e2fa7dae09a3bd1c0ee82c09a6d01703aa7df51381ff4f3a85b
pdf-font-stream PDF embedded font (sfnt) at offset 0x9987 5048 bytes
font_01_sfnt_off0000aaaa.bin
053ca6bd64510b81b3e753877b440527d32f4ce8fcb286b16bab0a1785316fc2
pdf-font-stream PDF embedded font (sfnt) at offset 0xAAAA 9992 bytes