Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cac00ce0220869e…

MALICIOUS

PDF

55.0 KB Created: 2020-08-20 23:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfdcb4f50042ba4145039064a48ea6e5 SHA-1: 2eddcf295d289455620ebafd63921781680661c1 SHA-256: 5cac00ce0220869e7a5031658e60720f910d878f6b77aba61ab46b88721e3e64
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains a lure related to formatting a USB drive, which is a common pretext for social engineering. It embeds a link to a known malicious redirector, ttraff.cc, which is likely used to deliver a secondary payload or lead the user to a phishing site. The presence of a mass external PDF link farm further indicates malicious intent, likely for SEO poisoning or distributing malware. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=formattare+chiavetta+usb+protetta+da+scrittura+software
    • http://zemovi.tangofloorspace.com/uploads/1/3/0/7/130775531/jadabubugezulugabu.pdf
    • http://files.inspiredfoodforlife.com.au/uploads/1/3/0/7/130740617/2925608.pdf
    • http://files.starplanappliances.com/uploads/1/3/1/6/131606672/bemotudisi_limurakeva_bufifidexi_bixazazunasixij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/pusekidapemubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/60097425952.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0101/files/megibejotulobex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61927850068.pdf
    • https://cdn.shopify.com/s/files/1/0428/5402/3327/files/86783589667.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/xinobodezim.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5387/files/campylobacteriosis_in_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/pedevalog.pdf
    • https://cdn.shopify.com/s/files/1/0440/7204/2661/files/46525453464.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1017/files/73028309452.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/dakaza.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/chapter_13_capital_budgeting_techniques.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_off00008d63.bin
8e876b84e1c818a011b27270286f8825b2806bcaf65ace767ac834898b933953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D63 5612 bytes
font_01_sfnt_off0000a064.bin
6629595d97a3c0b671424f8e64751e3c2d02d74849f7f6a445b0bb7d9d3e832d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA064 15124 bytes

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