Malicious PDF — malware analysis report

Static analysis result for SHA-256 14df499828b0bf53…

MALICIOUS

PDF

43.3 KB Created: 2020-08-29 16:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1450e266b4308b591f7b9eb4215a0237 SHA-1: afdbf57750079eaab0bd0cad8fbbb65d9cf2d1cd SHA-256: 14df499828b0bf53fbd1d813ba993de98923484e8820c0ef5c47c3941b7b7e08
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The document also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious intent, likely related to phishing or malware distribution.

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=quest%25C3%25B5es+sobre+grecia+antiga
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0105/1293/files/el_alquimista_libro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0439/9818/3582/files/womegi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1030/9787/files/duzadorodedikudixil.pdf
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/73266988502.pdf
    • https://cdn.shopify.com/s/files/1/0434/0695/0550/files/linuluzodove.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4869/files/minecraft_shield_designs.pdf
    • https://cdn.shopify.com/s/files/1/0434/8972/2534/files/r_for_data_science_cheat_sheet_datacamp.pdf
    • https://cdn.shopify.com/s/files/1/0432/7384/6952/files/bible_study_guide_for_genesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/fundamental_financial_accounting_concepts_8th_edition.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_off000066a0.bin
c3ea0170aedf318ae0267ac87faa781387139ded74d4ae2f18a5de87459e7f55
pdf-font-stream PDF embedded font (sfnt) at offset 0x66A0 5352 bytes
font_01_sfnt_off000078a2.bin
7e6fb3b42a5bab19d1e8cc14f91fe0492e8e222b6d8913dabd75e31a5fe79f80
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A2 12736 bytes