Malicious PDF — malware analysis report

Static analysis result for SHA-256 60623da4e66300e7…

MALICIOUS

PDF

38.8 KB Created: 2020-09-02 03:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9da96dd0ac02c85bec003ed5bdd6c5cc SHA-1: bb95fe6ea787992015c8e8c00a16dd0728400c6a SHA-256: 60623da4e66300e791249bcabcd2f772517685262e866be1e22456f1e1b4661a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged as malicious by an ML classifier and contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.cc/wix?keyword=airplay+2+android+box', is identified as a malicious redirector, indicating a likely attempt to lure users to harmful content. The document body itself is heavily obfuscated and contains similar URLs.

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=airplay+2+android+box
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_011939e2525b4c8495771338d02c31ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_c19cd60ae07f40c994fe66c297c2a607.pdf
    • https://static.usrfiles.com/ugd/61b8bf_6d571f6151eb41ce97d974f89b793411.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ad074537707482d9ef2dda3d167778b.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/elements_of_information_theory_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/96642430194.pdf
    • https://static.usrfiles.com/ugd/61f964_634b7942c7eb40a9827b4be27abd3c21.pdf
    • https://static.usrfiles.com/ugd/b8c837_042ded1c11234268b377a95cc34b3e07.pdf
    • https://static.usrfiles.com/ugd/d2751c_3518fc33834f4d20a8b6a42f6e881ce5.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_64193dacca25470dafe7c961fc199524.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5209/files/sitexupoperaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/3636/7265/files/shingeki_no_bahamut_virgin_soul_epi.pdf
    • https://cdn.shopify.com/s/files/1/0438/8100/5224/files/asus_battery_health_charging_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9328/files/82792732658.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_off00005929.bin
8c6e4ea624382767d8bd9299b6d97938847bdd6aaee39c963113fcb5668c0f0f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5929 5204 bytes
font_01_sfnt_off00006af3.bin
9f063b293d77132b8ae68f9145fe78ff2d573012e3f9806221f45498ab3532d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF3 10396 bytes