Malicious PDF — malware analysis report

Static analysis result for SHA-256 0623b59397690c62…

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 09:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a298e3cd0ae9691a80effacd3e5e2091 SHA-1: 42989aba7a030429239ac1c6d95c08275a8e71fb SHA-256: 0623b59397690c62fb56b631752f0584e65c146ad5931676bffe7b449b907c8c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm and a specific redirector URL, indicating an attempt to direct users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests a SEO poisoning or link farm tactic. The primary malicious URL identified is https://ttraff.com/wix?keyword=al+capone+does+my+homework+read+onli, which is likely used to redirect users to further malicious sites.

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/wix?keyword=al+capone+does+my+homework+read+onli
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/3347/5737/files/wokexozefafagisuruli.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/30285909378.pdf
    • https://cdn.shopify.com/s/files/1/0431/9933/2516/files/dinobexikapopukuzagipejej.pdf
    • https://cdn.shopify.com/s/files/1/0430/4044/0471/files/temporary_crown_came_off.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/10989746449.pdf
    • https://static.usrfiles.com/ugd/87d215_adfa7f2684514bd488756e2c3c9517b4.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_c2e3077d958f4240906108b53da17c05.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2190803f6a4aa79018dbb087649e63.pdf
    • https://static.usrfiles.com/ugd/96768c_ebcf6fda652342668bffd194a399df21.pdf
    • https://static.usrfiles.com/ugd/5ed537_3456089e34704a869c616d5fdb9eef66.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/xewuwinotud.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/jspdf_autotable_parameters.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062e7.bin
2b81807554aff489d50d98977d6791b208988eb3f76998c065bafe3f9cbc83fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x62E7 5268 bytes
font_01_sfnt_off0000749a.bin
867239d1e708bcdcd2e72ea8d71c383285676dfa539860c478a27a932ed42615
pdf-font-stream PDF embedded font (sfnt) at offset 0x749A 9928 bytes
font_02_sfnt_off0000969c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x969C 4324 bytes