Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba96f1b87aad934…

MALICIOUS

PDF

45.9 KB Created: 2020-09-01 14:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d058551bdf403375fba08dc2ac38a58 SHA-1: 254644e3d389bf693d47b324ff95bdcc24d25b5b SHA-256: 5ba96f1b87aad934c614c4525c733c52ed231d229337fabbe6f0e863a87b18a4
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=budgeting+spreadsheet+free', suggesting a lure to a malicious site. The presence of numerous other PDF links further indicates a link farm, a common tactic for SEO manipulation or distributing 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=budgeting+spreadsheet+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a2d007_536513fc33e9469a9305c58fa9118fe2.pdf
    • https://static.usrfiles.com/ugd/e8506d_8422704c7834462cb1de0745ff03e3b3.pdf
    • https://static.usrfiles.com/ugd/429b25_365baec4cf114a00922f3ee98e1759b3.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_9439889ae5d349be834b72ece5e4398c.pdf
    • https://static.usrfiles.com/ugd/314c35_7370baa0eb554d5490dacb94dfae29c6.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/nilil.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/taxilon.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/lorumuwemeketibojozomudo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/volefate.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/ctet_july_2020_paper_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/govuzotedobutuvojuvez.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/doropiraji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5480/0802/files/ligoziwekedurazobikati.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_off00007496.bin
70a36ab186f2bf6867592ff63cf7309c8c1edde7312679a9fd1daaf013748514
pdf-font-stream PDF embedded font (sfnt) at offset 0x7496 5320 bytes
font_01_sfnt_off000086ae.bin
327983568d5db61d2f776a7022b729032cc67bf6fa90f457de584dcc57b9e9a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x86AE 10492 bytes