Malicious PDF — malware analysis report

Static analysis result for SHA-256 0450c47991b15c4d…

MALICIOUS

PDF

44.2 KB Created: 2020-10-07 16:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 08d5e43d02b776604e1f7977bdf499d5 SHA-1: a26e26f2d4dd0a11ee803a2094302ebdc02339c5 SHA-256: 0450c47991b15c4dea2555a38c3efe2671cffcc39139d06e129d983165ec8822
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to external websites, many of which are hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. One of the primary links directs to a malicious redirector, indicating an attempt to lead the user to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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://cctraff.ru/strik?keyword=devexpress+grid+export+to+pdf In PDF document text
    • https://site-1036821.mozfiles.com/files/1036821/bopus.pdfIn PDF document text
    • https://site-1039711.mozfiles.com/files/1039711/bozobalatelagirif.pdfIn PDF document text
    • https://site-1036811.mozfiles.com/files/1036811/32295243628.pdfIn PDF document text
    • https://site-1042541.mozfiles.com/files/1042541/21150454845.pdfIn PDF document text
    • https://site-1039375.mozfiles.com/files/1039375/dikerunodugakufot.pdfIn PDF document text
    • http://files.maheshsomashekhar.com/uploads/1/3/1/3/131398322/6967125.pdfIn PDF document text
    • http://files.pro100pt.com/uploads/1/3/1/8/131856987/1623577.pdfIn PDF document text
    • http://files.engagecollin.com/uploads/1/3/1/3/131384055/6662684.pdfIn PDF document text
    • http://wiruj.daytimedomestics.com/uploads/1/3/1/4/131436967/kevevoxeziviwo_difazazuw_vopijor_jubupure.pdfIn PDF document text
    • http://files.ghouliesmovies.com/uploads/1/3/0/8/130814308/9493754.pdfIn PDF document text
    • http://daluderom.animalmystic.org/uploads/1/3/0/7/130776330/4361504.pdfIn PDF document text
    • http://xixevan.thepelvicunderground.com/uploads/1/3/1/4/131409474/8466452.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9932/4577/files/deadpool_x_force_action_figure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8617/1297/files/82452629097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9901/1738/files/84548523057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3111/3111/files/xorinepegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/4438/1082/files/lologonosesowad.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_off0000698b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698B 5096 bytes
SHA-256: d005b828c923b22f9322c3869a285266ab7288270a1b13b2bd816744a1f9ac56
font_01_sfnt_off00007b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B05 12684 bytes
SHA-256: ac0a16c6556b41b6836420cd3c76b9fca1d903b7a8317fc99e8a43c3dd927d03

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