Malicious PDF — malware analysis report

Static analysis result for SHA-256 609cf7d6bfbafd61…

MALICIOUS

PDF

39.6 KB Created: 2020-08-18 15:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4fe8a84dab5796af637ef2903ed1c1d SHA-1: 478047f9aca6aadc49ff5c70411936b610f3f87c SHA-256: 609cf7d6bfbafd61d1ba40fdb225ab1a2997d716d1e142917e9f156f9a518fdd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a mass of external links, many pointing to PDF files, indicating a link farm designed to manipulate search engine results or distribute content. One prominent link, 'https://ttraff.ru/pify?keyword=wow+classic+shade+of+eranikus+guide', is identified as a malicious redirector, suggesting the primary intent is to lead users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=wow+classic+shade+of+eranikus+guide
    • http://files.livingroomtour.net/uploads/1/3/1/8/131856877/6269827.pdf
    • http://fodofifu.ukuleleclub.org.uk/uploads/1/3/1/4/131406532/sezowedusu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/jurovobokupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/wajabomek.pdf
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/32559656481.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/quicktime_movie_trailers.pdf
    • https://cdn.shopify.com/s/files/1/0450/6091/5350/files/bobina_de_tesla_teoria.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/55770041498.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/xalebukitupovilikowopi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/20233796321.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_off00005d7e.bin
d701d5caf1927b4d66a98cd2aed4d41a13a31257f9e60dba9043838ce60bd94b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7E 5452 bytes
font_01_sfnt_off00007010.bin
e3ab33b9806ac82d9da7b63bcc853306a1737da9e370287d17df930e8ae6f6b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7010 9864 bytes