Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab8d2bc412d1c55…

MALICIOUS

PDF

42.0 KB Created: 2020-08-11 21:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d4eb664b07051a8f29d2c18d8f8ae8b SHA-1: f9ce6126e8a19263d3df6f4143cf904cf0e4f8c4 SHA-256: 6ab8d2bc412d1c5590dc27a3c2677b38f8e0b97227529d09973a5ae8a7d33af4
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=adhd+medications+canada+pdf', suggesting a lure to a malicious site. The presence of numerous PDF links indicates a link farm, likely for SEO manipulation or distributing further 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.cc/pify?keyword=adhd+medications+canada+pdf
    • http://files.centre-ipse.org/uploads/1/3/1/4/131438616/xutojateb.pdf
    • http://files.thegillt.com/uploads/1/3/1/4/131437513/e5ac65929cf933.pdf
    • http://dovujel.lefleurmuseumdistrict.com/uploads/1/3/0/9/130969573/gukoximamovu.pdf
    • http://zafonedas.lawyeringforlawyers.com/uploads/1/3/1/6/131636725/jipiwagarap_nitajewuzafeked.pdf
    • http://files.beaverstatedental.com/uploads/1/3/1/8/131857041/lumuzewavoxoru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/84230862447.pdf
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/17106139823.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35209966956.pdf
    • https://cdn.shopify.com/s/files/1/0428/8223/6583/files/foreromoliduj.pdf
    • https://cdn.shopify.com/s/files/1/0436/7246/9669/files/noriwivozigojatagoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/5833/1799/files/lixobudipejafafamepunovod.pdf
    • https://cdn.shopify.com/s/files/1/0429/4452/8550/files/robe_of_volatile_power.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5708/files/zexaxabaf.pdf
    • https://cdn.shopify.com/s/files/1/0438/2566/0066/files/44414661265.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/telemecanique_altivar_11_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/retasukisos.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/wisofelisuwog.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_off00006713.bin
e05792192fd88f28958ea231ffcf242d59c71b16cf41c9cab0ac630d07da5e96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6713 5256 bytes
font_01_sfnt_off000078cb.bin
70ad647a92aea3bc6945b21d5ae6770a5dd0aab2d574eef0deeb344d93a1220a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CB 10096 bytes

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