Malicious PDF — malware analysis report

Static analysis result for SHA-256 67546a2a8b220cdb…

MALICIOUS

PDF

43.4 KB Created: 2020-09-01 21:03:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db89022ca5b3a78a9f7813b6fcdfa723 SHA-1: 594321e43b07b3c2e1332658efac134535591db5 SHA-256: 67546a2a8b220cdbe0cfb5a87905ed3d61bb4ea6719526124aa6eb499d929d2a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.club/wix?keyword=calabozos+y+dragones+reglas+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'Calabozos y dragones reglas pdf'. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm strategy to obscure the malicious redirector. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.club/wix?keyword=calabozos+y+dragones+reglas+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_a8977a81fa1544d79f2289a7fe1f5aff.pdf
    • https://static.usrfiles.com/ugd/429b25_e054e7692378477b90ac24d6f391765f.pdf
    • https://static.usrfiles.com/ugd/b8c837_abb20bad16374a96ba6a072e9a25c470.pdf
    • https://static.usrfiles.com/ugd/58a813_cb467c20523b486a9996c305daa862f4.pdf
    • https://cdn.shopify.com/s/files/1/0437/2286/6842/files/balistica_forense_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0461/7489/6281/files/android_apps_mx_player_pro_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/tradingview_chart_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7252/8292/files/11678736113.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/organic_chemistry_eighth_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/3752/2085/files/creatures_by_cr_5e.pdf
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/logepeladitatapila.pdf
    • https://static.usrfiles.com/ugd/90c678_63cca6748db443dba25a795793c1a2b2.pdf
    • https://static.usrfiles.com/ugd/78c764_5af38a4b2f8644f1acd244798164dfb2.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_off00006845.bin
2ef61b6b7594fe0f39485850c91403d75364579fb5c197ac5b3b2c0073c3eb71
pdf-font-stream PDF embedded font (sfnt) at offset 0x6845 5408 bytes
font_01_sfnt_off00007abf.bin
9a78eb0ecc6557569022ea1f6f3ec727e373123c101a5204280f458c5316387b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABF 11328 bytes