Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8d3c242aadda11…

MALICIOUS

PDF

49.7 KB Created: 2020-10-15 22:17:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9587bcb69b68d0f7d84879d7ae7145cc SHA-1: 9747e38f1575d50595fbddd3031a12b60e17c801 SHA-256: 1c8d3c242aadda11266facf643b056b7c48ebcf4024e8a2d547365f661ce0362
184 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to disposable hosting services, indicating a link farm or SEO spam campaign. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the malicious URLs, suggesting the primary purpose is to redirect users to potentially harmful sites.

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://gettraff.ru/123?keyword=sniper+strike+fps+3d+mod+apk+revdl In PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/7e3d1.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/gedupi.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7904132.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/5858400.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/wuxuwalazifila.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/xelikanotuzifaja.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/xalurawi.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/dowomaxaviri.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/lanadez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f871cf820eeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f878b109d97a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f87597051c1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f86fdb1a0d6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5f8778e925fcb.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/pelupe.pdfIn PDF document text
    • https://rabifupokuwu.weebly.com/uploads/1/3/1/1/131164250/pidejatowuv_sadogumapizaleg_fusirezatodaxu.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/tusulemogisizi.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/pufego-ludajikef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f87be71c4b31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f87ff1730eaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f87012c147a7.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/likovero-lowusa.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D05 5576 bytes
SHA-256: 1edd47eef2511acdb2e81e07a3c3fbcc09e955e1e05320c4dc6a688b2d1746c8
font_01_sfnt_off00007fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE5 10604 bytes
SHA-256: 2cbae717763cb768548d122e27823ed8e20fbc872b1ca435668978ec730f0bee
font_02_sfnt_off0000a3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3DE 16160 bytes
SHA-256: b4d62efa195a2b4e000f8e677d07f67e36e8fcfc99319eaa5118aed7638d171a

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