Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ffdb07ffa440b5…

MALICIOUS

PDF

106.8 KB Created: 2020-08-08 11:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7ec462563656bbcfea546758183f3ed SHA-1: c17e5c8b055a09d8b712bbc99b20273318da7b79 SHA-256: 75ffdb07ffa440b59539b08e3b5f3a7af6ebbc5aa1792bec1e637f74c93aae61
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links also points to a link farm or SEO abuse tactic.

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=breaking+bad+news+to+patients+guidelines+pdf
    • http://files.firpoint.net/uploads/1/3/1/6/131636725/rezaratudezugel_pusenabi_pedipirikuxug.pdf
    • http://files.erinjenkinsart.com/uploads/1/3/2/6/132681308/1679932.pdf
    • http://files.tridenthabitat.org/uploads/1/3/1/6/131606059/burorog_wajivi.pdf
    • http://files.harnesslead.com/uploads/1/3/0/7/130740044/22a95a7fb15f0.pdf
    • http://files.williamsburgrec.com/uploads/1/3/0/8/130815228/xaponubepi-bubuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4101/3412/files/arapa_renme_kitaplar.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/darebomopoxuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/lavize.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/wixojosowitufirivaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6580/2903/files/38488761567.pdf
    • https://cdn.shopify.com/s/files/1/0432/1542/1600/files/lirorotufixijijavubaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7365/files/begoxuvutetiwinaxogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2085/files/46068034509.pdf
    • https://cdn.shopify.com/s/files/1/0431/7052/9436/files/kefujomakijo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0857/3085/files/wodoxozixifum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/75997441266.pdf
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/kelekunojavamelawozo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/bopamozisote.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_off0001415a.bin
163df6f425c4387a4ad416d7f3b2389569aa04a984e45ac4f71628ecd55984ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1415A 5552 bytes
font_01_sfnt_off0001545e.bin
bbbd0e3bef537f58062c481e6dd2cc7d50aed47ab0db8be5b9b955f32acce200		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1545E 16788 bytes
font_02_sfnt_off00018846.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18846 16060 bytes

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