Malicious PDF — malware analysis report

Static analysis result for SHA-256 6240cd77a8b6ee10…

MALICIOUS

PDF

52.4 KB Created: 2020-08-01 22:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 573476c133a34731a1bccfc9d6c3a1cf SHA-1: 2a7e2ce3c76c46e7e15ca3568380454a668c7a0e SHA-256: 6240cd77a8b6ee1083db3e8925e75f152d5bf98b7e3f787deae543e7508551af
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a direct link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=merge+two+sorted+arrays'. This indicates the document's primary purpose is to redirect users to potentially harmful sites.

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/pify?keyword=merge+two+sorted+arrays
    • http://files.tasmantranscription.com/uploads/1/3/1/6/131606727/8c134e2c49.pdf
    • http://files.jroennau.com/uploads/1/3/2/3/132303075/f2bca1701.pdf
    • http://files.bearsnbling.com/uploads/1/3/1/1/131163634/gotejezorekew_jenaw_janegutap_fivej.pdf
    • http://files.mrsgreenger.com/uploads/1/3/0/9/130969659/gonelag-kibewofu-keguvaxusatawu-xodotesedoza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/49033305441.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/xamidutog.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/89577954445.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/66857418629.pdf
    • https://cdn.shopify.com/s/files/1/0435/5253/8773/files/hamilton_beach_steamer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/magipatirimiliroseponux.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/boguzuxuvefigeremosasamak.pdf
    • https://cdn.shopify.com/s/files/1/0438/1789/4050/files/kemiluvonaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/31020554160.pdf
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/posokenufol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/tenavew.pdf
    • https://cdn.shopify.com/s/files/1/0434/2205/6600/files/nezixilelomiliga.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069df.bin
69c3d5491e45929bda53cba3e99767509ddd450759e5b959724922179f27f9bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69DF 5160 bytes
font_01_sfnt_off00007b9d.bin
4460d14adb592a748fa40cda06e291c6330884db3cfeae86e5584eff4852f2c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9D 15840 bytes
font_02_sfnt_off0000acf7.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACF7 16312 bytes

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