Malicious PDF — malware analysis report

Static analysis result for SHA-256 7689c6a868569bb3…

MALICIOUS

PDF

83.6 KB Created: 2020-08-15 02:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ec58d308b68e79ef22f4f973f2af8de SHA-1: 6751bd4a225144414c86eeefa76ecb624594ae3e SHA-256: 7689c6a868569bb3f480717e8f0f87e5d62a9b164a8e30644da0c0f54fcca869
154 Risk Score

Malware Insights

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

The PDF contains a lure related to a "certificate of appreciation template wording" which, upon inspection, links to a malicious redirector. The document also hosts a large number of external PDF links, likely for SEO manipulation or to obscure malicious activity. No scripts were extracted, but the presence of malicious redirector links and the link farm indicates a high likelihood of a phishing or content-scraping attack.

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=certificate+of+appreciation+template+wording In PDF document text
    • http://files.samarbetsbolaget.com/uploads/1/3/0/7/130739222/7ed35dc329b.pdfIn PDF document text
    • http://gogozugor.mrdombaza.com/uploads/1/3/1/4/131407406/7618681.pdfIn PDF document text
    • http://files.uplift.ccsdtitle1.org/uploads/1/3/1/8/131871621/gasofixujem_luwumibute_xobune.pdfIn PDF document text
    • http://files.alexjbass.com/uploads/1/3/1/4/131408204/pulej-bigavavubonunor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/xoxejoxovolesunenobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/sql_formatter_online_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/jegexakoxosuxanibij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/89206904466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/81570521768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/92422908785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/dikezasanelebudizamivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1255/2864/files/how_to_play_sounds_through_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/xopomegodejiwibigujew.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f970.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 2828 bytes
font_01_sfnt_off0001036b.bin
e85bd67eff272ba28c70f9de484ea9b7a2515b9f0b47695dc8ce1ccd200fb5ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1036B 5292 bytes
font_02_sfnt_off00011562.bin
c57a07f72ecdf7204954b595295ef7690ca2dc46be13d12ad6d21fbb2a297748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11562 13516 bytes

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