Malicious PDF — malware analysis report

Static analysis result for SHA-256 1200e9c29c85dd67…

MALICIOUS

PDF

45.7 KB Created: 2020-11-05 09:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4de3df36828bd8fdb7b2cf77fcc80ea5 SHA-1: 38ea6338f9c3b9c27311890911df83e8464795fe SHA-256: 1200e9c29c85dd67bcc484ae7d436d26ec42b39ef5f6e85be4b8b2499919b5d1
184 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 disposable hosting services and redirector domains. The primary link identified, 'https://ggtraff.ru/strik?keyword=modern+romance+pdf+download', is flagged as a malicious redirector. The document's structure and link farm indicate a likely attempt to manipulate search engine results or direct users to malicious content, potentially for phishing or malware distribution.

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/strik?keyword=modern+romance+pdf+download In PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/mapan.pdfIn PDF document text
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/6105882.pdfIn PDF document text
    • https://buxijoxusezo.weebly.com/uploads/1/3/1/4/131483018/e3dc9.pdfIn PDF document text
    • https://vezorobabuwej.weebly.com/uploads/1/3/0/9/130969079/golenusasek-mugobawo-nolupux-zabuxul.pdfIn PDF document text
    • https://zidinekolinom.weebly.com/uploads/1/3/4/5/134516346/e10a00cd8862a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5f8f4a3a11f40.pdfIn PDF document text
    • https://tafogufuju.weebly.com/uploads/1/3/4/6/134638326/xegak.pdfIn PDF document text
    • https://leziwave.weebly.com/uploads/1/3/4/4/134446015/9615918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f8749a7cb032.pdfIn PDF document text
    • https://ralawuxageg.weebly.com/uploads/1/3/4/3/134319431/wajapidagizisowaxe.pdfIn PDF document text
    • https://reredutubonuki.weebly.com/uploads/1/3/0/7/130775370/puwemesud.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/savopejup.pdfIn PDF document text
    • https://guzebiba.weebly.com/uploads/1/3/4/3/134368687/zibuba.pdfIn PDF document text
    • https://ranemexamegen.weebly.com/uploads/1/3/4/4/134440137/d11e0.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/tuzipesuvasat_fobirujifo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000770b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 5220 bytes
SHA-256: 34abce4d7dcd61100375c8ca74161a9c10836dd9dda1cfdfc1fbe821f80226ce
font_01_sfnt_off000088d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D5 9824 bytes
SHA-256: 20d2c31f773cbe8a1d7c1c569ed107c95627b3f90caa58c372d83b3dfa53e50b

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