Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a6eebc75278d16…

MALICIOUS

PDF

76.5 KB Created: 2020-08-31 04:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf125f70aa7a90cde08f4e23c6b66029 SHA-1: cb681033fe1238078f82f88b0644f1f451923ec0 SHA-256: f2a6eebc75278d16ce1751187027a89677e4985b0277c9e21ae24a7e94479d96
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=los+protocolos+de+sion+descargar'. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Los protocolos de sion descargar'. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the 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.cc/wix?keyword=los+protocolos+de+sion+descargar
    • https://cdn.shopify.com/s/files/1/0446/0979/8307/files/accident_report_writing_training.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/80698917524.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1114/files/vepititenamebudisurufabij.pdf
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/calendario_serie_a_2020_19_gazzetta.pdf
    • https://static.usrfiles.com/ugd/0f5b72_6181edcc78e14cbdb10dadc0d598e0e5.pdf
    • https://static.usrfiles.com/ugd/16a96a_35c77cec46494bbeb9dd8570043129f3.pdf
    • https://static.usrfiles.com/ugd/5ed537_351a6e98e5344b7b9bfc4c66dd4d732b.pdf
    • https://static.usrfiles.com/ugd/b8c837_40b0e2f330ed48b687c04fd0fa65e47c.pdf
    • https://static.usrfiles.com/ugd/97aff7_5ed90b4d252e43ad9f4c0013f0711eaf.pdf
    • https://static.usrfiles.com/ugd/de02f3_846de093c053478590f15a7b2f685c38.pdf
    • https://cdn.shopify.com/s/files/1/0432/7568/1947/files/adagio_baermann.pdf
    • https://cdn.shopify.com/s/files/1/0459/3224/9255/files/fedasilufotuvobumugujino.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/gre_verbal_reasoning_practice_questions_with_answers.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e49e.bin
c555f2cb26291d8a44c1d52984fbf933cb0649352a6b193be02423a9868125e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE49E 5184 bytes
font_01_sfnt_off0000f64f.bin
680d2c8385e2d6ca2ec8c423a5c4f9b09eb33d4963a0d3e4228960dadc417fee
pdf-font-stream PDF embedded font (sfnt) at offset 0xF64F 14788 bytes