Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee21e37c09c2bb1…

MALICIOUS

PDF

39.0 KB Created: 2020-08-28 01:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d542168c581312347d64661616c0bc4 SHA-1: 2f44d45787b07193e04837f9bcd29161fbfa8151 SHA-256: 5ee21e37c09c2bb18aeb3358cf6c6a6e57a6596b0127352e94c7092ddd2382c7
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=manual+test+de+la+familia'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains references to remote support tools, suggesting a lure to install or connect to such software. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to malicious infrastructure, likely as part of a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=manual+test+de+la+familia
    • http://files.exquisitekreations.com/uploads/1/3/1/6/131607029/9020855.pdf
    • http://files.sumikoshimada.com/uploads/1/3/2/6/132682989/e2f26fcf505db4.pdf
    • http://files.ibizawalkingassociation.com/uploads/1/3/0/8/130874118/2978a99274.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/cagliari_mappa_turistica.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97503793953.pdf
    • https://cdn.shopify.com/s/files/1/0436/1394/6018/files/81827261513.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1589944702.pdf
    • https://cdn.shopify.com/s/files/1/0438/8405/2648/files/80321671267.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/13044179254.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/sac_aspirateur_electrolux_silent_performer_classic.pdf
    • https://cdn.shopify.com/s/files/1/0434/7812/2649/files/nijuzofesuzonalol.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/kugujakaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/descargar_abbyy_transformer_pro_3._0_full_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0429/6343/5679/files/34559687763.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/52201985258.pdf
    • https://cdn.shopify.com/s/files/1/0432/1637/1867/files/drager_anaesthesia_machine.pdf
    • https://cdn.shopify.com/s/files/1/0437/6333/5319/files/2790101186.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_off00005fc3.bin
823fe5784cd7199dc16dcf56f94fe67a0d3cbf7bbd1051a828ae3c8405b67eef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC3 4964 bytes
font_01_sfnt_off0000709b.bin
155b484c572195bee912b89e60309406e052ba55d5a5c45906b0977058fb794f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x709B 9024 bytes

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