Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e201173c2390ce6…

MALICIOUS

PDF

49.4 KB Created: 2020-08-12 03:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d129376bb574c42362747b939be95931 SHA-1: dd115d3dfc1d28cd83ea3c8ac009ced2babc417c SHA-256: 6e201173c2390ce6acb6b18aa5d660344c54a9b5f2410b5022aaf41775621908
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to drive traffic to malicious sites. The ML classifier strongly indicates maliciousness, and the presence of multiple external links suggests an attempt to redirect users to potentially harmful content.

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=anti+cancer+diet+book+pdf
    • http://vajinen.dc-struggle.com/uploads/1/3/0/9/130969054/5862200.pdf
    • http://xamowo.ossipeevalleyfair.com/uploads/1/3/0/8/130873995/5772670.pdf
    • http://voxodafir.seedsofwisdomschool.org/uploads/1/3/1/0/131070161/0cdffe395d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/16818382137.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/56190380519.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sujaxitedidubabupopivup.pdf
    • https://cdn.shopify.com/s/files/1/0430/8949/4177/files/33206440307.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/21371935455.pdf
    • https://cdn.shopify.com/s/files/1/0447/8589/3542/files/learn_javascript_visually.pdf
    • https://cdn.shopify.com/s/files/1/0433/8889/5386/files/anlise_de_contedo_bardin_1977.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/hallelujah_nuty.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/18360602010.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4111/files/twilight_book_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8760/1559/files/67449115841.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_off000074e8.bin
36d3ddacc662f03c334e550777e4540d72893fcc7f626da8e31914b51e3bed79
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E8 5132 bytes
font_01_sfnt_off00008661.bin
bcc81aca7fc0e4c604443076a79cc63794f31e974f949a5e78eb00a48625b755
pdf-font-stream PDF embedded font (sfnt) at offset 0x8661 16392 bytes