Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6a2bad33614711…

MALICIOUS

PDF

44.8 KB Created: 2020-10-26 22:35:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: afd377601a2d0f43e2e83a1eb0da3641 SHA-1: d365ea79d375366a5705055634623a17c30c729c SHA-256: 9d6a2bad33614711c1a2f887b4ad0a957142e0e4d3e4a9ec07ed53750e9a5b63
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query. This redirector likely leads to further malicious content or exploits. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded links, many pointing to benign Shopify URLs, suggests a link farm or SEO poisoning attempt to mask the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=hindman+funeral+home+johnstown+pa In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8df44862c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377936/normal_5f8b95aa13de9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416664/normal_5f969061c7a15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390680/normal_5f911f985274f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f8706b210b84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9064/7471/files/50803781000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6260/8280/files/84884129889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5644/2777/files/geography_of_pakistan_mcqs.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/xififijugona.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/2818827418.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/pulses_names_in_english_with_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2305/7051/files/21216326588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3745/7575/files/xukopalowesagazenajusiter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3144/4128/files/underneath_the_arches_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/3934721782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/2493/0728/files/novelas_romanticas_historicas_divertidas.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/92220418943.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/pdf_anesthesia_pharmacology.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/lapekadodewaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/85291168667.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EF 5292 bytes
SHA-256: 14d889d4bb545745ffcd18d916b9ccf19107f33c42a46cb15a8889c15f53d0af
font_01_sfnt_off000072c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 10924 bytes
SHA-256: 8f212cca660d1af3617a3b2adc48b8fc3e678227fbd9dfcbdedc8e03e2a9dbb8
font_02_sfnt_off0000977b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x977B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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