Malicious PDF — malware analysis report

Static analysis result for SHA-256 675b7cf70d4aa357…

MALICIOUS

PDF

41.2 KB Created: 2020-10-30 03:17:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 613f924574811e4483d4e35f2212121a SHA-1: 3d9c245b7c26c7b1ddb4a6997c0823d1becd64ac SHA-256: 675b7cf70d4aa35799e429043449f86bc2c2b1a2555e42e5745baf2424d87222
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files, indicating it functions as a link farm. One of the primary links, 'https://ggtraff.ru/aws?keyword=play+therapy+techniques+for+attachment+issues', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The file's purpose appears to be directing users to potentially harmful or deceptive content through a network of links.

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 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.
  • 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://ggtraff.ru/aws?keyword=play+therapy+techniques+for+attachment+issues In PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/zekixubu-zewiwoga.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/vataboj_vadefawusimor_refogesanawuve.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/ae6209b98.pdfIn PDF document text
    • https://sedifuwenute.weebly.com/uploads/1/3/4/4/134464273/kided_busox_wozejado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/modede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ff1b61-9b82-4c94-840b-47b7741d6078/11420845519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2469/7509/files/27160344834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6989/6367/files/63822463095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5134/3768/files/acid_base_lab_worksheet_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf3ba4f1-6522-4632-b92b-58f5a41c4325/radev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8859/2046/files/19240241714.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/ashrae_62._1_free_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD2 5484 bytes
SHA-256: a86b4345137707a0f53b57b58f7c883ec858063c9bed6013423f08973eb3557f
font_01_sfnt_off0000725e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725E 10972 bytes
SHA-256: df6c656c23ace941d377e1003d7a018e06045d40895aded5140273688bc99d2b

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