Malicious PDF — malware analysis report

Static analysis result for SHA-256 6026a62b3cf6a349…

MALICIOUS

PDF

46.2 KB Created: 2020-08-15 08:17:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3dbb62d7b0ecfb60de9e15ba25f7f55 SHA-1: 463b90a7724278522e61227f457e3fb777605d88 SHA-256: 6026a62b3cf6a349ac502b4610b660009056069f82edf151ef51aee29c1ed328
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at "https://ttraff.ru/pify?keyword=bauer+hockey+size+guide". The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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.ru/pify?keyword=bauer+hockey+size+guide
    • http://files.historianstevecampbell.com/uploads/1/3/1/4/131407898/mojow.pdf
    • http://vidunesu.joelmiddleton.com/uploads/1/3/1/4/131438563/zenunusopojumevir.pdf
    • http://files.callylawson.co.uk/uploads/1/3/1/4/131408930/dogubi.pdf
    • http://files.thisisupstate.com/uploads/1/3/0/9/130969080/3dc6fd93280b8.pdf
    • http://files.chewthenswallow.com/uploads/1/3/0/9/130969960/2857291.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/bufetadepaxak.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/nofurijopirekuw.pdf
    • https://cdn.shopify.com/s/files/1/0436/5176/0281/files/13557040918.pdf
    • https://cdn.shopify.com/s/files/1/0431/6508/9949/files/adjetivos_para_describir_personas_en_frances.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/form_14_missouri.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/901986066.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/32712745498.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/windows_7_ova.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_off00006ac3.bin
834273cb3f3bf8a3aa00832758f1346508ec0ca53d67445559bc7699783c924d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC3 5436 bytes
font_01_sfnt_off00007d4b.bin
39f70d01a59fa88d01e59c556aa750a1aa8f45fd84fd4d18a2c818e3291af5b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4B 15244 bytes