Malicious PDF — malware analysis report

Static analysis result for SHA-256 766b26df685ca7d1…

MALICIOUS

PDF

44.5 KB Created: 2020-08-10 01:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1f152535b1a893e9d6369ab3a75af35d SHA-1: adb59af9beb20ac87bae7dcfcc935fa9a55e30bc SHA-256: 766b26df685ca7d1b37540773cb5321bc80a3c001392072eec1a060ecccc868d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a phishing or link-farming scheme. The ML classifier strongly indicates maliciousness. The embedded links likely serve to direct users to malicious websites or download further payloads, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=alto+sax+songs+pdf In PDF document text
    • http://files.hostmaster.abodeinteriordesigns.co.uk/uploads/1/3/0/7/130740138/2716145.pdfIn PDF document text
    • http://files.fishmougey.com/uploads/1/3/2/7/132741348/7028152.pdfIn PDF document text
    • http://files.extensionslashnbrow.com/uploads/1/3/1/4/131407112/tafidovo_sukugisudubupip_miponazujubig_femoropewiwilu.pdfIn PDF document text
    • http://files.malopesportfolio.com/uploads/1/3/1/4/131454012/9528d08d.pdfIn PDF document text
    • https://musescore.coIn 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/1/0434/7835/2034/files/apollonia_saintclair.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/texas_county_fips_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/fopigufuvamazoligu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4874/7676/files/91505836653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/xamesefetikefidif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/77832693424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/recovery_server_could_not_be_contacted_mojave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/82065046291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/59557648211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/ata_chapter_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7634/4225/files/73183219259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/60952241196.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: fishmougey.com 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF6 5172 bytes
SHA-256: 770b7655a016a2718b54aa1280f49f16949ab9ed7eb81d5ad055b99708868aaa
font_01_sfnt_off000060af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AF 14208 bytes
SHA-256: a9ba8bf2e6a04950f1b47eaada0a0bca0a0e0fd561ade8f4f6f88cb4c343bd37
font_02_sfnt_off00008e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3F 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e