Malicious PDF — malware analysis report

Static analysis result for SHA-256 074b1bf628fa2267…

MALICIOUS

PDF

49.5 KB Created: 2020-10-07 22:14:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fb1bed8ef19197046389c158cb8e99e6 SHA-1: 6042fc18bed6587a380ea869b9bc094b6dcd42cc SHA-256: 074b1bf628fa2267fd4a9e8131788a857e476b3cf939e2cbc79fdf18e78360d7
124 Risk Score

Malware Insights

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

The PDF file contains embedded links that point to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains URLs similar to those found in the extracted URL list, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://gettraff.ru/strik?keyword=pack+carburizing+process+pdf In PDF document text
    • https://site-1039641.mozfiles.com/files/1039641/badazezuliritomavirex.pdfIn PDF document text
    • https://site-1038927.mozfiles.com/files/1038927/titego.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/xomisipodoxexevuvepe.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/navukuboduzuxizinaf.pdfIn PDF document text
    • http://files.40tas.com/uploads/1/3/1/6/131636576/2b6fcf93ec1.pdfIn PDF document text
    • http://files.shopbatala.com/uploads/1/3/1/4/131437655/tedojedoza_bifigedawolipu_lananiziku.pdfIn PDF document text
    • http://muletiw.stpaulhondo.org/uploads/1/3/0/7/130738629/3811873.pdfIn PDF document text
    • https://site-1038650.mozfiles.com/files/1038650/gevewubajajilasosivo.pdfIn PDF document text
    • https://site-1039802.mozfiles.com/files/1039802/44496129902.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/0313/0268/files/costway_twin_tub_washing_machine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7731/2411/files/golf_groove_sharpener.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1479/1069/files/gomenne_gomenne_lyrics_german.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000739a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x739A 5544 bytes
SHA-256: 494c13ad55e72b7aab6f33290084225ed1e5dc55055467f3a638e8690f3da876
font_01_sfnt_off00008680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8680 6068 bytes
SHA-256: 58b4873d33ac9fffaf45ed1a2312b8eb5fadf3b067e77f8cfe9e87095f6a7717
font_02_sfnt_off00009631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9631 10076 bytes
SHA-256: 863e1420adc2ee5dfba0a6bee128a5ba290324108ef84fbe6c71de2b1635d9bf

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