Malicious PDF — malware analysis report

Static analysis result for SHA-256 002a97c881217d65…

MALICIOUS

PDF

36.9 KB Created: 2020-10-09 09:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c7f0efbdce8350935210c413c7b81b40 SHA-1: 91acdcf8d3f9f5f99bd62dfb8118ad4b4da7f9e4 SHA-256: 002a97c881217d6504883b389006394c717d2cd3cb47c800f9554ff7ef760125
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, many hosted on disposable domains. This behavior is indicative of a link farm, likely used for SEO manipulation or to distribute further malicious content. The presence of a malicious redirector link further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/pify?keyword=the+procedure+handbook+of+arc+welding+pdf In PDF document text
    • http://files.tracks-up.com/uploads/1/3/2/6/132695387/6780097.pdfIn PDF document text
    • http://files.anthonyhehir.com/uploads/1/3/1/4/131406149/gifadej.pdfIn PDF document text
    • http://files.coolbananafilms.com/uploads/1/3/1/4/131409017/ragat_welit.pdfIn PDF document text
    • http://duwigase.rawdiamondhair.com/uploads/1/3/0/7/130776485/3568821.pdfIn PDF document text
    • http://files.zanmatthies.com/uploads/1/3/1/4/131453170/bivoxores.pdfIn PDF document text
    • http://files.ppncenter.com/uploads/1/3/1/8/131857983/4965610.pdfIn PDF document text
    • https://site-1038390.mozfiles.com/files/1038390/22306461071.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/parunipi.pdfIn PDF document text
    • https://site-1044440.mozfiles.com/files/1044440/nuwevovawedezama.pdfIn PDF document text
    • https://site-1042926.mozfiles.com/files/1042926/65329272910.pdfIn PDF document text
    • https://site-1036684.mozfiles.com/files/1036684/fugixiraxibitofomu.pdfIn PDF document text
    • http://files.ultraufitness.com/uploads/1/3/0/8/130874237/momamilorigogapo.pdfIn PDF document text
    • http://files.nebraskarainbowgirls.com/uploads/1/3/1/3/131379253/45ff15d32d30360.pdfIn PDF document text
    • http://files.briankinkadeportfolio.com/uploads/1/3/0/8/130873877/murotowuva.pdfIn PDF document text
    • http://gojaboz.aokcollectibles.com/uploads/1/3/1/4/131437987/bc19aff.pdfIn PDF document text
    • http://bamiku.stagerighthomes.net/uploads/1/3/1/4/131438707/5519404.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50DC 5484 bytes
SHA-256: afb6c222c6b6f4dbf301b071bcd6e8f88581d4d1e073ff92e79b6304e8f8db45
font_01_sfnt_off00006390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6390 10196 bytes
SHA-256: 24a43e9aefb30f27a7a12b5c20f7dd0575da517d09a439920352a6b5e3f432a0

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