Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1607905d8dc0f9…

MALICIOUS

PDF

42.2 KB Created: 2020-07-09 18:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 6b09b98495a4d549b969250d80db2bd8 SHA-1: 2ad8d27f7e2ce18038c46a20a274a5f488a7871a SHA-256: ca1607905d8dc0f9c52efed4247a068072cbd9fccfd4e8b0a6e76298aa8838a1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a mass external link farm, with many links pointing to seemingly random PDF files. One prominent link, 'https://ttraff.ru/wb?keyword=oclusion%20vena%20central%20de%20la%20retina%20pdf', is identified as a malicious redirector. The document's content and structure suggest a phishing or malicious redirection attempt, likely to distribute further malware or lead users to scam pages.

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://ttraff.ru/wb?keyword=oclusion%20vena%20central%20de%20la%20retina%20pdf In PDF document text
    • http://files.crescenttrail.org/uploads/1/3/1/4/131454238/fojegiv-wumaxiradibamaj.pdfIn PDF document text
    • http://files.floridapackages.ca/uploads/1/3/0/8/130874458/fef5e9fe8c5b.pdfIn PDF document text
    • http://files.chrisspaight.com/uploads/1/3/0/7/130775912/4301966.pdfIn PDF document text
    • http://files.vwmoriarty.com/uploads/1/3/0/8/130873895/1223947.pdfIn PDF document text
    • http://files.artlynchactingcoach.com/uploads/1/3/1/3/131380868/tagaxe.pdfIn PDF document text
    • http://files.dawnanncurtis.com/uploads/1/3/1/4/131483440/1957171.pdfIn PDF document text
    • http://files.epub-free.com/uploads/1/3/0/7/130740180/b140219.pdfIn PDF document text
    • http://files.wildlyjoyfullife.com/uploads/1/3/1/3/131379039/4953496.pdfIn PDF document text
    • http://files.aniasadourian.com/uploads/1/3/0/8/130814984/9f35687.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://jexepimen.files.wordpress.com/2020/07/gejirumagotosifala.pdfIn PDF document text
    • https://wenoseb.files.wordpress.com/2020/07/77773641163.pdfIn PDF document text
    • https://siluvewonuno.files.wordpress.com/2020/07/27122223902.pdfIn PDF document text
    • https://garitusupodi.files.wordpress.com/2020/06/7377862135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31184917419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43396058945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38970143778.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2581582401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73807437975.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

Related samples 8

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_off00006593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6593 5120 bytes
SHA-256: ed1e13c795cd20117324087f2c5c53b972be02a08ea8417d1714c8c14fa295b1
font_01_sfnt_off0000770c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770C 10772 bytes
SHA-256: 2a65faab475f805d89b580ad1a0b5564ce2431e9d4ddcc111a115ce15712f221

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