Malicious PDF — malware analysis report

Static analysis result for SHA-256 72dac970fbde7b7e…

MALICIOUS

PDF

48.7 KB Created: 2020-08-13 15:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c35a5b401c920a5a966d415bf93e1b33 SHA-1: c221d58878d26b3f3d93c256934f9ab7af46d235 SHA-256: 72dac970fbde7b7e858b4500c4d9dad121fcdaefee5dd832783b1a444fce0a41
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ano+ang+kultura+pdf', suggesting a lure to a malicious site. The presence of many external links, including benign Shopify links, indicates a potential link farm or SEO manipulation tactic to distribute 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=ano+ang+kultura+pdf
    • http://kibog.mrfhistory.com/uploads/1/3/0/8/130814297/995fcc13153f6f.pdf
    • http://gapenox.holistichealthcare.ca/uploads/1/3/1/3/131380005/576e99b42732.pdf
    • http://sonibeje.kelvingibbons.com/uploads/1/3/1/4/131438177/fobaxelekalemewamos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8634/7417/files/work_party_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/vibudizorolijilirog.pdf
    • https://cdn.shopify.com/s/files/1/0438/6439/1845/files/21212090174.pdf
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/56593808098.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7957/files/tagapinujataguronevox.pdf
    • https://cdn.shopify.com/s/files/1/0434/4594/4481/files/autobiography_of_sachin_tendulkar_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/getewevan.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/fusion_fichier_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/wordly_wise_book_8_lesson_5_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/8344/7966/files/kadar_caruman_epf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/26105253308.pdf
    • https://cdn.shopify.com/s/files/1/0433/2129/5003/files/wijedinunobeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/7291/2549/files/lemokamen.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/pakolifivag.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_off00006c41.bin
c146b224f8642c7d0103f432e6a641a1e8ccd8d48e159008afee47d37cc82d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C41 5084 bytes
font_01_sfnt_off00007da1.bin
1e9dffe7e08cc6bd34efc84b972553bc1e53dcde0a9bca6cdc769970676d59ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA1 10180 bytes
font_02_sfnt_off0000a068.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA068 16204 bytes

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