Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73c46551bb26ccf…

MALICIOUS

PDF

41.8 KB Created: 2020-10-07 11:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5b527fd9078f902b1ecf10742460670d SHA-1: fed2152c92facb1cff729e9e22c9a559eec8215e SHA-256: a73c46551bb26ccfcd1559427d92d94bcfb5b6ce1249d8a845e4c7afa5e54be3
184 Risk Score

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/pify?keyword=rhetorical+situation+5+elements In PDF document text
    • http://lilenij.ashwoodfertilitycare.com/uploads/1/3/2/7/132741194/1461318.pdfIn PDF document text
    • http://files.angyhall.com/uploads/1/3/1/4/131406592/8312354.pdfIn PDF document text
    • http://files.dellsstp.com/uploads/1/3/0/7/130739376/4613901.pdfIn PDF document text
    • http://files.networklakestevens.com/uploads/1/3/1/4/131438439/rowesiz_wusexaf_sutatadurix_monejope.pdfIn PDF document text
    • http://lusafener.proreefcorals.com/uploads/1/3/0/7/130739560/wizunat.pdfIn PDF document text
    • http://files.handymanservicesanchorage.com/uploads/1/3/0/9/130969738/2041868.pdfIn PDF document text
    • http://files.dallasoregonparks.com/uploads/1/3/1/0/131070309/7181850.pdfIn PDF document text
    • http://ketator.heritagefloristcortland.com/uploads/1/3/1/4/131453558/6172085.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/200a734f-5e97-4d1d-8db3-d4404392f7bd/6160817708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6294/2106/files/xobawovofurafutidofovef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/3178/8182/files/ori_and_the_blind_forest_map_fragments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4606/3265/files/wizards_first_rule_tv_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5702/9024/files/50567377834.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_off00006678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6678 5172 bytes
SHA-256: 2a161ca60a635ea95036e4009d6dfc80aec3b0ae825d200c2ffc01680b69f205
font_01_sfnt_off000077e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E7 10128 bytes
SHA-256: 62a40bff81088601870166e91852c1538de3484295b6930d9724da046dcfaeca