Malicious PDF — malware analysis report

Static analysis result for SHA-256 578def10a8a38955…

MALICIOUS

PDF

44.3 KB Created: 2020-11-06 04:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 624db2e227c5c0ac50a46667abbced16 SHA-1: d479c9b7751d37b9c175cfdcf662e45934c1d262 SHA-256: 578def10a8a38955f077a0901785d12327f3ba857fc48ded548289097feab310
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, including one pointing to a known malicious redirector at 'https://ggtraff.ru/strik?keyword=who+and+whom+worksheets+with+answers+pdf'. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing. The presence of a large number of external PDF links also indicates a potential SEO poisoning or link farm tactic.

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=who+and+whom+worksheets+with+answers+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5f9b9cbc74096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5f8fcc45269da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5fa1135a52ee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f8d9facc5f4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_5f90f3803ff1a.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://s3.amazonaws.com/mefovu/nfhs_baseball_rules_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ace928a5-620f-4db2-a3a9-c3b6dad9dbc2/25177455519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/epr_bullets_volunteer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a1fd8f-81f4-4aaa-a8f7-a86f80a3d324/resopapirixosuzeragasof.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunoje/javadimadewewifob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4723/8811/files/property_management_in_kenya.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/toxoplasmosis_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/94779574855.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/redidemovikatadogoz.pdfIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/matelugilene.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/diagnostic_imaging_gynecology_2nd_edition.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_off00006056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 5208 bytes
SHA-256: 1cc7df10eb572c913f748b405174d7130a83e0666959e0940fe2de565fc57e7a
font_01_sfnt_off000071ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71EC 10508 bytes
SHA-256: ce3ae1f2f2693636ed25999515469b7a16b3ce5f5b9ca52701dd95eb4dc3b9a4
font_02_sfnt_off000095e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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