Malicious PDF — malware analysis report

Static analysis result for SHA-256 77cde60898e3f014…

MALICIOUS

PDF

35.4 KB Created: 2020-08-11 20:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aeedabedbe071cd9073b45e6ca77f77 SHA-1: 04b0127e3cd5de65cc1be93f1abb61c7d4f12f17 SHA-256: 77cde60898e3f0146480d925006d180dee74b8d0ae028d542065590ab315dbc7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass of external links, with the primary link directing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=simple+gifts+piano+pdf', suggesting a lure to disguise malicious activity. The presence of numerous other PDF links indicates 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/pify?keyword=simple+gifts+piano+pdf
    • http://files.busterscinematicuniverse.com/uploads/1/3/0/8/130874474/3458996.pdf
    • http://files.fionasremedialmassage.com/uploads/1/3/2/6/132695734/4212506.pdf
    • http://xemikaz.streamatsspp.com/uploads/1/3/1/6/131606260/5526baebce94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/beatles_song_characters.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/acta_constitutiva_de_una_sociedad_cooperativa_mexicana.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/patak.pdf
    • https://cdn.shopify.com/s/files/1/0437/9652/9314/files/34761735406.pdf
    • https://cdn.shopify.com/s/files/1/0435/0846/5828/files/62136689930.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/30338338933.pdf
    • https://cdn.shopify.com/s/files/1/0445/6172/7647/files/gungeon_charm_horn.pdf
    • https://cdn.shopify.com/s/files/1/0440/0722/7550/files/irritrol_rd-_600_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0816/2974/files/xipibuvukut.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/la_caida_del_imperio_romano_heather.pdf
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/dusapuxupozegipux.pdf
    • https://cdn.shopify.com/s/files/1/0438/0455/7472/files/manual_hedge_trimmer.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_off00004dc2.bin
0eb1fb13420f9133bd1b9900667c5e5f7cb08839028c01871379b75edefbfd0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DC2 5368 bytes
font_01_sfnt_off00005ff5.bin
db056490201b4ecb0d8f0bffc37abd8d3463036ede2d8d2d2a765673e22b58aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF5 9652 bytes