Malicious PDF — malware analysis report

Static analysis result for SHA-256 6adc0cddb9b9535c…

MALICIOUS

PDF

33.8 KB Created: 2020-08-29 04:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ea6ebc245ae0fac99239ea44d45eecb SHA-1: bcd6caca2b1d407bc2c6dbeb790f2db9c4c47777 SHA-256: 6adc0cddb9b9535c03d9dbec77366bb5bc7616b12b7626cbf78041e0a7fe9616
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm for SEO manipulation. The embedded URL in the document body, 'https://ttraff.ru/wix?keyword=strategic+management+dess+7th+edition+pdf', is likely used to direct users to 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/wix?keyword=strategic+management+dess+7th+edition+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_c96237e87a974f5bb768d8462d8342b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_980e1393dd6346279d5be4732cd1654f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a7a3304c6474d6ca47f26549268ee81.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a72c0dbd08049159532716359c511d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_542a3a5babbd4b889e26299174a4c0fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fd8ada274a24b20b8dde73a64c197bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_efec9eb68e56477fb6a6a8eed6735244.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f3c953a33f848168f00aea00b7fdb5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb64cded6af143a19dc62e4d775f7656.pdf
    • https://static.usrfiles.com/ugd/b8c837_15f6d476237140a09f7b6bb1f7149c77.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/gadoxapajabazogixogobo.pdf
    • https://cdn.shopify.com/s/files/1/0462/7827/9317/files/1st_grade_math_worksheets_free.pdf
    • https://cdn.shopify.com/s/files/1/0464/8042/5112/files/archeage_fov_mod.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_off000046a6.bin
5be1fe020a11b02cfce48c4912cb110cdaa11c5402912689009998fdb9853104
pdf-font-stream PDF embedded font (sfnt) at offset 0x46A6 5720 bytes
font_01_sfnt_off000059ef.bin
2458b495f5faa778c1be3cf2ffb642c37f9eafec209a7ca47b467cf4359fc3d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x59EF 9568 bytes