Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eb3a80dd8405424…

MALICIOUS

PDF

50.3 KB Created: 2020-08-14 23:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 341a5c68de0cf56269f646a0f1b9a33b SHA-1: 18514b7223edf77b9faa9abcb8342c4720ad2a06 SHA-256: 6eb3a80dd8405424edc402d3b62f35edfa55118679d88f68060a6b18460bb9b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous other PDFs, with the primary link leading to a known malicious redirector. This suggests a tactic to distribute malicious content or lead users to phishing sites. The ML classifier strongly supports the malicious verdict, and the presence of a redirector URL indicates a high likelihood of malicious intent.

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=aiff+format+songs
    • http://files.alifeworthliving2.org/uploads/1/3/0/8/130874318/lenalaw-fowez-legojumafixixin-tunotababivofen.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1090/8572/files/89529044809.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/kalikasan_ng_akademikong_pagsulat.pdf
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/pearson_biology_textbook_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/35409068944.pdf
    • https://cdn.shopify.com/s/files/1/0440/3871/7605/files/5631627333.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/wivevipavosokomebuzomut.pdf
    • https://cdn.shopify.com/s/files/1/0429/4888/6684/files/boundaries_for_your_soul.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5944/files/small_steps_louis_sacher.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/christian_brutal_sniper.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e57.bin
d4b35fb73d428d0fd4623862e6628f765c89fb4965428c4aab5b5df606d81252
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E57 1784 bytes
font_01_sfnt_off00007711.bin
5789b03647b8cd7866d2aeefbbcbc23ad3104acb3fc05572981b827e07e5a751
pdf-font-stream PDF embedded font (sfnt) at offset 0x7711 5044 bytes
font_02_sfnt_off0000881d.bin
4eea820848c3bbd5af470316047a0a57239b1d00f8e99afff88aefa5e9c139f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x881D 16532 bytes