Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d67b92a5fd7001e…

MALICIOUS

PDF

43.9 KB Created: 2020-08-26 14:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a93c3fc4e0c1f1081f4d9a86fb62958f SHA-1: b379366177c97f2ad692765d0731dfe82dfe0cf0 SHA-256: 0d67b92a5fd7001ebbc1da073e19bbe9362b415b40c46852360501a2c938f605
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The document body, though heavily obfuscated, contains references to 'Bendy and the ink machine images' and a URL that appears to be a redirector. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to drive traffic to malicious sites.

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=bendy+and+the+ink+machine+images
    • http://gonapinu.leadingedgeequine.com/uploads/1/3/2/6/132680835/9241252.pdf
    • http://xadet.bgnazarene.com/uploads/1/3/0/7/130776804/wejidoma.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1751/9772/files/samarasimha_reddy_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9773/files/surewotusugelupugosipoxij.pdf
    • https://cdn.shopify.com/s/files/1/0432/7545/2569/files/natopeb.pdf
    • https://cdn.shopify.com/s/files/1/0436/1368/3874/files/balanza_analitica_ohaus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/bobcat_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9957/files/92468601075.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/jomupupixurovivajik.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/24374317195.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0301/files/nawuxuzutetelelib.pdf
    • https://cdn.shopify.com/s/files/1/0466/3934/9925/files/nuvijuvadeje.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/15982043064.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/xebotomoxe.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_off00006f02.bin
6cf842c911eacf7a9d24fb1e7ad8786a39cc25285dd1d87c2d97eab9e0f674f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F02 5440 bytes
font_01_sfnt_off00008164.bin
b160404a7dc5cfb5da1de71c8412450d52cbb8c2d8830b8ae98bae76a32e0660
pdf-font-stream PDF embedded font (sfnt) at offset 0x8164 9812 bytes