Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a5a46da1b4959c…

MALICIOUS

PDF

53.9 KB Created: 2020-09-02 01:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12250f661b92bc240f244c9bff0a35e2 SHA-1: ca9d050b89c05232d281d50562f25e1b1c5fa7d2 SHA-256: 14a5a46da1b4959c0e7fffdfce85b38d36efbfb6ee69a55238ad0ef663d048cb
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, which is designed to lead users to malicious content. The document's content, though heavily obfuscated, appears to be a lure, possibly related to a game guide, to entice clicks on these malicious links. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or redirection attempt.

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.me/wix?keyword=battlerite+champions+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/217d68_1491bdaf7e0a4ca3b404fdf48f983adc.pdf
    • https://static.usrfiles.com/ugd/b5472a_a8405ac2f09d4106abc21afc39d4fb28.pdf
    • https://static.usrfiles.com/ugd/917232_4b2342c1375846908c0def2c9bece049.pdf
    • https://static.usrfiles.com/ugd/954c8b_41cecc1f23a34e5c84e3a5e8bab5be4f.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/ensayo_del_libro_para_combatir_esta.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/49497884428.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negonarufefozosaburesid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5299/8556/files/1935690527.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/xabuveliruxotunelarer.pdf
    • https://static.usrfiles.com/ugd/76b6de_05726cff56a04f2c9e92463837c22441.pdf
    • https://static.usrfiles.com/ugd/2e16aa_acf72ee7d32b407892745697bd2ad22c.pdf
    • https://static.usrfiles.com/ugd/f55bec_0e99530d56844015994383391eb9ab3c.pdf
    • https://static.usrfiles.com/ugd/5cd33b_d8f2b3c2fe4d416e986200cf4662961b.pdf
    • https://static.usrfiles.com/ugd/3826db_070a987a889e4e6b8b5118756d3e3c36.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_off00008fe9.bin
de016e40b1872da5c05c49d7d8a506bd3e03e61c463987deeaff75aa8d86e370
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE9 5536 bytes
font_01_sfnt_off0000a28a.bin
c5e80afbc0328b2844d96ab11435ce849b4ecaf1409e588687dc087b03b417c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA28A 12588 bytes