Malicious PDF — malware analysis report

Static analysis result for SHA-256 6501bdb9998fcd6f…

MALICIOUS

PDF

61.9 KB Created: 2020-08-26 03:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b1d5bf966822be6fbd86b8155f622d6 SHA-1: e5c95390cac799ef208ee9cafb3ff19064169e82 SHA-256: 6501bdb9998fcd6f5654bc34e766bcf6f44e771255b1bd1e62860cd04562f7e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to manipulate search engine results. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=99+names+of+allah+with+meaning+download
    • http://vizow.williamcottam.com/uploads/1/3/0/7/130739068/2566004.pdf
    • http://files.aakashproperties.com/uploads/1/3/1/8/131871734/711184.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1656/8482/files/45311663790.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/96474478360.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/mobewugasuxokoxapavuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/acute_toxicity_testing.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/18270013547.pdf
    • https://cdn.shopify.com/s/files/1/0436/1607/5939/files/lumilume.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/toxicwap_power_season_5_episode_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/0656/6306/files/xijururexalix.pdf
    • https://cdn.shopify.com/s/files/1/0435/4814/7867/files/besomaxupamiroruvuva.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b768.bin
42376c6b90e8f58bdc6cca2dfc071dc1d7d049af66cde75d5151e935249aa780
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB768 28960 bytes
font_00_sfnt_off00008164.bin
14e6dbcf90ab85280ace059be557e38378a7c36a6e13268dad1b6b8e024da62d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8164 5376 bytes
font_01_sfnt_off00009392.bin
19771ff4650c5e361bd4ba9cd03a9a205e3e420d2d426e985fa8b3cc585744bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9392 10488 bytes