Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6e667044713740…

MALICIOUS

PDF

43.8 KB Created: 2020-08-06 04:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21b28c579020ebcaebb0685011e6cd40 SHA-1: c3dbed0482bf29d02aa8679cc7bde45887c6975a SHA-256: ea6e667044713740a0a826f615e2a18d18a47bfa354ef19b2078aef768234e43
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a machine learning classifier as malicious and contains a link to a known malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious URL identified is https://ttraff.ru/pify?keyword=activated+carbon+adsorption+pdf, which likely serves as a lure or initial stage for a broader attack. No scripts were extracted, limiting the analysis of direct execution behavior.

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=activated+carbon+adsorption+pdf
    • http://files.naturalhealthprotocol.com/uploads/1/3/1/4/131438142/9265671.pdf
    • http://files.perseveranceandpotatoes.com/uploads/1/3/0/7/130776141/nanugedogalaxetepopo.pdf
    • http://files.spiritcentral.org/uploads/1/3/0/9/130969993/5791019.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/tilalotigakuvuvemedipab.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/larinog.pdf
    • https://cdn.shopify.com/s/files/1/0429/9030/5443/files/tibuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3031/files/resejejugofugibomi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/mopabemataresop.pdf
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/isuzu_rodeo_parts.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/i_care_beyonce.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/korotipidovixuva.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/87953018734.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c97.bin
d7a0c9d8eb0ed5119b90df902a9c209f5962e7924e35dd8a5bac0ca0027fa0c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C97 5304 bytes
font_01_sfnt_off00007eb2.bin
d83391462524663e57989f92324e5c3401b4ab4500a251987005cf6d35868f4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB2 10324 bytes