Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35060f1607f987b…

MALICIOUS

PDF

40.9 KB Created: 2020-10-12 07:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 79fe754b1648047f0698236b95f39ffc SHA-1: 1c72005083ab7d99ba61a373cc3bb32e80357073 SHA-256: f35060f1607f987b95effb1147645b522a66b400623556ceb3decd8dd09403d3
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to known malicious redirector infrastructure or disposable domains. The primary URL, 'https://cctraff.ru/pify?keyword=troy+bilt+tb625ec+repair+manual', is identified as a malicious redirector. The document's structure suggests it's designed to host a link farm, likely to distribute malware or facilitate phishing attacks. No scripts were extracted, but the presence of malicious links is sufficient evidence of malicious intent.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/pify?keyword=troy+bilt+tb625ec+repair+manual In PDF document text
    • https://site-1037246.mozfiles.com/files/1037246/sovabi.pdfIn PDF document text
    • https://site-1039398.mozfiles.com/files/1039398/kerezovajegokusexexegis.pdfIn PDF document text
    • https://site-1040343.mozfiles.com/files/1040343/45226762401.pdfIn PDF document text
    • https://site-1040798.mozfiles.com/files/1040798/29322258661.pdfIn PDF document text
    • https://site-1036761.mozfiles.com/files/1036761/32775625601.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/57297655844.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/lomonidumawalinorotufi.pdfIn PDF document text
    • http://fiwopudu.thehealingwordchurch.org/uploads/1/3/0/7/130739423/6403295.pdfIn PDF document text
    • http://files.most-wanted-ent.com/uploads/1/3/1/1/131163943/tuwajorusuxose-zosewe-sameda-xotamazakubo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006196.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006196.bin)
    • https://cdn.shopify.com/s/files/1/0483/7982/2233/files/22882353419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4647/6708/files/71750792100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1424/0931/files/32343828777.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 extracted file (font_00_sfnt_off00006196.bin)

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6196 5500 bytes
SHA-256: 8b0f4ec41d6617134d225d86ed019310f8dcae653299b2e16a8bf1ed81a0c5e1
font_01_sfnt_off00007440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7440 10256 bytes
SHA-256: e87cdddf56c1ef199ec144c22c725aaef6437c6e343523377ecb45fc4469b4c5

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