Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce222d2f35a722f…

MALICIOUS

PDF

43.0 KB Created: 2020-07-09 23:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 93f171e23361d7059c139aca7fbfcc1d SHA-1: b5870bcfc7a7417f9baa85d7a019ab13cb527564 SHA-256: 4ce222d2f35a722f678a84d1c8bf7ddeedeeeb6f6b1c331a7f21259044df618b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded URLs, identified as a link farm, which is a common tactic for SEO manipulation or distributing malicious content. One critical heuristic firing indicates a link to known malicious redirector infrastructure. The document body, while containing garbled text, also includes the URL 'https://ttraff.cc/wb?keyword=phonics%20worksheets%20for%20older%20students', suggesting a lure related to educational content. No scripts were extracted from this sample.

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=phonics%20worksheets%20for%20older%20students In PDF document text
    • http://files.holdmetightasheville.com/uploads/1/3/0/7/130775371/buxafanum.pdfIn PDF document text
    • http://files.publichealthmuseum.org/uploads/1/3/1/3/131384789/a826b1b39.pdfIn PDF document text
    • http://files.sandrapaolalopez.com/uploads/1/3/0/8/130813851/b7389bf85b399a3.pdfIn PDF document text
    • http://files.forresterflooring.net/uploads/1/3/0/9/130969907/woxupujetuwije.pdfIn PDF document text
    • http://files.folsommusic.com/uploads/1/3/1/3/131378816/5173153.pdfIn PDF document text
    • http://files.sitebuilder.middletennesseeflyfishing.com/uploads/1/3/0/7/130738991/vemuju.pdfIn PDF document text
    • http://files.body-knowledge.com/uploads/1/3/2/6/132681824/2094315.pdfIn PDF document text
    • http://files.besedin.org/uploads/1/3/2/6/132682561/d857f9aef2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://nurabekowiv.files.wordpress.com/2020/07/wogagidotelefuzasiperine.pdfIn PDF document text
    • https://fivulenis.files.wordpress.com/2020/06/dutozamol.pdfIn PDF document text
    • https://vekokipevi722356982.files.wordpress.com/2020/06/xosoxevotajigowowosobi.pdfIn PDF document text
    • https://zijolaraf.files.wordpress.com/2020/07/gubelavadibaza.pdfIn PDF document text
    • https://febidaj.files.wordpress.com/2020/07/98687096486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43181801848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38140624907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.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_off00006b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B00 4940 bytes
SHA-256: 6b081ca77cf32bb462b62d3e0090f2d837ce6decf2c5569160e0ab6ec70bc8a8
font_01_sfnt_off00007bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC9 10328 bytes
SHA-256: b55741de408bb59e1a8ec867935fa23c17a1ec8c49e2746950491718eabda458

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