Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1db21690a6a478…

MALICIOUS

PDF

42.4 KB Created: 2020-07-11 00:40:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 6f1bff2ea0d372e9cc43fa727c17e4fd SHA-1: f98acbc144006c79bc4a86b37a9c492a68ef6b8a SHA-256: be1db21690a6a478f2b1d286b1c2eb16e2766621c877bd94da548261884c1cd4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The document body, though heavily obfuscated, contains text related to marketing and includes URLs that are likely intended to lead the user to malicious sites. The primary attack pattern observed is the use of a link farm within a PDF to direct users to potentially harmful content.

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.cc/wb?keyword=marketing%20segmentation%20positioning%20and%20targeting%20pdf In PDF document text
    • http://files.polloperu.com/uploads/1/3/2/6/132681398/9598772f91.pdfIn PDF document text
    • http://files.publichealthmuseum.org/uploads/1/3/1/3/131384789/a826b1b39.pdfIn PDF document text
    • http://files.oikstrategy.com/uploads/1/3/1/4/131406433/pelijabuvik-kunipija-novivegome-xikejiza.pdfIn PDF document text
    • http://files.malleuspublishing.com/uploads/1/3/1/4/131453799/6582409.pdfIn PDF document text
    • http://files.operationhelpahero.org/uploads/1/3/1/4/131453531/tovaxe.pdfIn PDF document text
    • http://files.carolgalais.com/uploads/1/3/1/6/131636946/jenumigum-gagawopiganom-ginuz-siponimowimisik.pdfIn PDF document text
    • http://files.cninc.org/uploads/1/3/2/7/132740479/5324237.pdfIn PDF document text
    • http://files.cookbuilderssupply.com/uploads/1/3/0/8/130813923/8880bc7b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://regowom.files.wordpress.com/2020/06/dupunuwutulutimotuk.pdfIn PDF document text
    • https://bedavizopop.files.wordpress.com/2020/07/56031291639.pdfIn PDF document text
    • https://dufepenal.files.wordpress.com/2020/07/88423673708.pdfIn PDF document text
    • https://toximutuzowu.files.wordpress.com/2020/06/joposakevalunodaroti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bebupikisanomagidilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2033782386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rixozuxixewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/genofisamanudeva.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_off000067b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B8 5184 bytes
SHA-256: 68b7abdda9432d2a6f3862b85e7783fd060e43848d176ad0bd900000aa6a1f6a
font_01_sfnt_off0000794d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794D 10444 bytes
SHA-256: dfc9ded73bcc1cdb61d0fdc36cc1d6a0dc2811fe323a0d86195030c43b165ceb

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