Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a5e17062660aa38…

MALICIOUS

PDF

32.2 KB Created: 2020-08-13 01:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23651f62a18e89fce676fad9221f205b SHA-1: bc1e59df1610476dc3fd1d240d5b7fadce8e8edd SHA-256: 6a5e17062660aa38c907324dc98707d13acbbfcdf2bb2c4d530df5ab030dc255
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/wb?keyword=vyper%202.0%20manual'. This suggests the document is designed to trick users into visiting malicious sites, likely for phishing or to download further malware. The presence of many external PDF links also indicates a link farm, potentially for SEO manipulation or to host additional 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/wb?keyword=vyper%202.0%20manual
    • http://tigim.rebeccadarlene.com/uploads/1/3/1/3/131383407/ruvuz.pdf
    • http://fiwuv.campranchoframasa.org/uploads/1/3/1/1/131164239/kejiromugadakav-xudalaga-bikil-jufawuzazorumo.pdf
    • http://files.southcarolinamarijuanalaw.com/uploads/1/3/1/4/131453136/derulidesonexowos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/saifurs_analogy_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/jelly_gta_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/s125_on_w2.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/dapavifa.pdf
    • https://cdn.shopify.com/s/files/1/0445/6002/3711/files/stripe_test_card_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/deraverekemiloxepetikipe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2243/files/sotifufex.pdf
    • https://cdn.shopify.com/s/files/1/0437/0045/3541/files/dasogakaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/fallout_new_vegas_mod_pack.pdf
    • https://cdn.shopify.com/s/files/1/0430/6052/7253/files/apicultura_en_ecuador.pdf
    • https://cdn.shopify.com/s/files/1/0435/9946/2558/files/nitelipetamusidowulutolas.pdf
    • https://cdn.shopify.com/s/files/1/0432/6142/7876/files/kiveguwuvewewidotukukokax.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_off000042a3.bin
fa0c14fd6caa856778801acedc7e6605d62c25bc1ac50616eca2edf1e512a592		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42A3 5160 bytes
font_01_sfnt_off00005424.bin
cc6bc0122184a27c7f599c0bde4f9e108aa12f3815d8e1ead972f0a3e50353f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5424 9416 bytes

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