Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0735815f74fd733…

MALICIOUS

PDF

49.1 KB Created: 2020-11-07 01:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 642caf0040b15b2608cb43a84c24db3c SHA-1: 3d8889a22091859df735775fbcbfeaec232150b6 SHA-256: f0735815f74fd7330ef1e4f3fe20922c0aacff8e53d8254a1933796605dc547c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting or redirector services, indicating a link farm designed to distribute traffic to malicious sites. One such link, 'https://ggtraff.ru/aws?keyword=college+degrees+crossword+clue', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting an attempt to disguise malicious activity as legitimate 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://ggtraff.ru/aws?keyword=college+degrees+crossword+clue In PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/razinemep_duvakitedikaz_wibenex_ferid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f977fc3c6a98.pdfIn PDF document text
    • https://fujimerikav.weebly.com/uploads/1/3/4/3/134307110/e75a91b0483bf.pdfIn PDF document text
    • https://vefoxetewezelir.weebly.com/uploads/1/3/1/4/131483279/9326128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411511/normal_5fa238d5d2d3b.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/tuzamada/writing_matters_william_van_cleave.pdfIn PDF document text
    • https://xeloketibi.files.wordpress.com/2020/11/estimation_and_costing_nptel.pdfIn PDF document text
    • https://lejenoz.files.wordpress.com/2020/11/26228488684.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/samez.pdfIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc58ddab-70f3-4c1e-982b-7de83b76904a/82243255569.pdfIn PDF document text
    • https://vabavoresadi.files.wordpress.com/2020/11/debewasomogoro.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_off000081a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A6 4896 bytes
SHA-256: 63fceb00263ee71a4f1100be9bf76ed8ec13303e3184f80d7dd9eefdd0a3fde6
font_01_sfnt_off0000926f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x926F 10848 bytes
SHA-256: 38692429622ce837e3992ec7130e419ffaa241a3b583c4f86b508cb769eddbdd

Open this report in the interactive analyzer, or submit your own file for analysis.