Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ef1a0d78438317…

MALICIOUS

PDF

39.8 KB Created: 2020-08-06 04:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce8b4f8178a0964a88e61676edf9d34 SHA-1: 1cc3c878a2dda492e67dd150471b07c55e8b406f SHA-256: 61ef1a0d784383175bb5d3cd250aae35a64c3ce66fe49f58924721cd7e028eb2
154 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the critical heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains references to a "90x action planner pdf" and includes the malicious URL, suggesting a lure to a phishing or scam page. The presence of numerous other PDF links further indicates a link farm strategy.

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.com/pify?keyword=90x+action+planner+pdf
    • http://files.schoolofwong.com/uploads/1/3/2/7/132741162/9928107.pdf
    • http://files.wordcraftoforegon.com/uploads/1/3/2/6/132682235/44f3077b5.pdf
    • http://files.eastmain-salonspa.com/uploads/1/3/0/8/130814169/e2dea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5372/7394/files/pezilixaruz.pdf
    • https://cdn.shopify.com/s/files/1/0433/2158/9913/files/i3_multiple_monitors.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/anglo_american_model.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/need_for_speed_underground_2_crack.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4181/files/sedewudetojogakagoxaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/24480492950.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/phenylhydrazine_msds.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/riniwolojewebojonotel.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/72557647080.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_off00005e54.bin
b36c211d57a645aa7c6cc4f7ca3ac98b3f1ef9e8e28c59cc6ed09fe598faafa6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E54 5240 bytes
font_01_sfnt_off0000703c.bin
4d244a58a40c90fd5fddb5415599ccc0da69b9edecaeb3f827970ff0ac3da85a
pdf-font-stream PDF embedded font (sfnt) at offset 0x703C 10168 bytes