Malicious PDF — malware analysis report

Static analysis result for SHA-256 c392078baf0718c7…

MALICIOUS

PDF

45.7 KB Created: 2020-10-03 01:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c9b0b2de4e10bc17485b302278b916f6 SHA-1: 2c6823c74ab25888c86dbc7caeeb6ece2dfe14f3 SHA-256: c392078baf0718c758b9be63930d1543d5c4bbc21b0cb9b36ea718a09234e071
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a search result for a book. This is further supported by heuristics indicating a malicious redirector link and a PDF link farm, suggesting an attempt to drive traffic to potentially harmful sites. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection scheme.

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://ggtraff.ru/strik?keyword=storyteller+leslie+marmon+silko In PDF document text
    • http://wosoniva.angelicessencehealing.com/uploads/1/3/1/6/131606727/wipevalad.pdfIn PDF document text
    • http://tirupowek.wewalktogethercharlotte.org/uploads/1/3/1/3/131384609/xofowox-xikokemadokis-bolubafefimom-sanunegem.pdfIn PDF document text
    • http://files.ukassignments.net/uploads/1/3/2/3/132303329/5544436.pdfIn PDF document text
    • http://files.hoariverrun.net/uploads/1/3/1/4/131453623/zefizotulumo.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/jefinunidejukefoguz.pdfIn PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/84801087610.pdfIn PDF document text
    • https://site-1039896.mozfiles.com/files/1039896/29944909441.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/soketapak.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/43501611079.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/1/0433/3548/3551/files/zhou_dynasty_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5529/2317/files/the_transfeminist_manifesto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/fluke_voltage_tester_leads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/5029/4171/files/89449788102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d226b9c-c8b8-4c80-bb66-a13f5923f88d/gagano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d60f019-34cf-4e49-bd1a-9052ba4834d6/27993425720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ee13e4-80cd-43f1-8bcb-753e3245b085/79730010583.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_off00007678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7678 5100 bytes
SHA-256: 7c56fdbb26430bdfd60a083c43ba270b4ddbd481477bfe6dc511fdba20cede7f
font_01_sfnt_off000087b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B7 9992 bytes
SHA-256: 4b82ee881a5a2c12eee8a2e23d2855aa4b0158c3dc1188c9d998944b8546c9d7

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