Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de80f4e142504b5…

MALICIOUS

PDF

51.2 KB Created: 2020-08-19 01:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8d31406316bde20ee6b65f8b2a73760 SHA-1: 24762f084cf823dd2e8b672619436699063017b6 SHA-256: 7de80f4e142504b5015962b38b638fd1378a9d58d1c4a973921ab4fab674a798
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 benign Shopify URLs, but one critical link redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=android+adb+wifi+settings', suggesting a lure related to Android settings. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates an attempt to lead the user to a malicious site.

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.com/pify?keyword=android+adb+wifi+settings
    • http://vabufuru.joynorstrom.ca/uploads/1/3/1/6/131637814/e6ed38a173467.pdf
    • http://files.ruthwilkin.com/uploads/1/3/0/8/130814308/0d29c6a0f3701.pdf
    • http://files.roejendradesigns.com/uploads/1/3/1/4/131406762/wugagumigejo.pdf
    • http://xekat.mediterranean-maudsley-forum.co.uk/uploads/1/3/0/8/130814328/soluwuwutudu_besubitoduxot_nalolazulupo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/bringing_words_to_life_beck.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/gezupupawaluladeneberonag.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/xilodimusipawilija.pdf
    • https://cdn.shopify.com/s/files/1/0438/2982/1602/files/cultivo_de_caucho_en_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/xizukabiloroketakikow.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/how_i_treat_acquired_aplastic_anemia.pdf
    • https://cdn.shopify.com/s/files/1/0432/0700/0219/files/tipomipoledul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fiwowosilikaragufes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/barcelona_metro_map_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/6601/5400/files/62274246195.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/854786321.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/75165469726.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_off00007ca4.bin
8d50be1c0d5772adab1d2358977c746bab6d44e72293e0095e7808ce47d40220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA4 5264 bytes
font_01_sfnt_off00008ead.bin
433e91bb1fa5b0b9406128cc30fe82e6eae38e7ac35e91edb91776217bfd5963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAD 16108 bytes

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