Malicious PDF — malware analysis report

Static analysis result for SHA-256 72cdd362c5e5e840…

MALICIOUS

PDF

45.3 KB Created: 2020-08-30 16:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 867fbcd65e0065eb09969a7ddba34feb SHA-1: ebbd2788e9aecaa91eb829adfde4462e99e1dc98 SHA-256: 72cdd362c5e5e8402055ccafcc8b1fd648277fdd589458abc377cc798254c6c3
154 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=marcia+campbell+florida'. It also exhibits characteristics of a PDF link farm, with numerous external links, many of which are to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL and a list of Shopify URLs, suggesting an attempt to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=marcia+campbell+florida
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/wegaximexalatesaweja.pdf
    • https://cdn.shopify.com/s/files/1/0439/0413/9416/files/tipusex.pdf
    • https://cdn.shopify.com/s/files/1/0428/4776/4636/files/83866526848.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/fadadikov.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0434/7346/9597/files/raspberry_pi_commands.pdf
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/zejunekisabawipimajuxinow.pdf
    • https://cdn.shopify.com/s/files/1/0438/5954/2176/files/mosanifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/trick_attack_ffxiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/bodifolapuwurezoxam.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2411/3049/files/luvivifaxemiwunimix.pdf
    • https://cdn.shopify.com/s/files/1/0434/4430/6086/files/calendrier_hijri_2020_maroc.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/pifepufivakagikiribofawep.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/61205258250.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/86876048565.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_off00005e48.bin
caf6d650175e2077c7dcb80d99be2675fd4c985822a35ca69195ec3b7f756dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E48 5268 bytes
font_01_sfnt_off00007012.bin
94d6d75a4585768b31f4b651dc5826d85cda9c772a14d16447dcd654923dba74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7012 10320 bytes
font_02_sfnt_off0000938b.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940		 pdf-font-stream PDF embedded font (sfnt) at offset 0x938B 16036 bytes

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