Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0780e74ddac8fc…

MALICIOUS

PDF

44.9 KB Created: 2020-10-16 01:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 63c35342a769a378d6b74a5e2837d1a6 SHA-1: 0063be58a8e55bc4559247244db8d99e97813117 SHA-256: 5a0780e74ddac8fc5aa34ef342610a9ee29c5b6a5cd73038ba3799e9b6dcfc4b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to disposable hosting or known redirectors, indicating a link farm designed to lure users to malicious sites. The primary malicious URL identified is https://ggtraff.ru/123?keyword=telling+time+worksheet+for+second+grade, which is flagged as a malicious redirector. The document body, though heavily corrupted, contains fragments suggesting an attempt to disguise the malicious links as an educational worksheet.

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://ggtraff.ru/123?keyword=telling+time+worksheet+for+second+grade In PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/606c3c.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/bisofonitakopos-gudawubimoliw-tajabafox-wotifene.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/teximajovevogekapad.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/zofosowoz-dijewejelenub-joditoxu-kukowizutus.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/65100f.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/ebe0be.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/nokekul-feboji.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/992946.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/fb12799be67d593.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.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/40c8db8e-3cfd-4113-9e82-15cea93ba036/49109851120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/135dce52-a209-47bc-923f-2b5d57878254/95432217964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4746288d-a950-4194-9ad6-963048a8dd58/9619140570.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/600e771b-b0ff-40b1-b17d-4ff910a0dd2f/59851427569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be2f27f-6f7b-4e81-a0ed-783108661d61/vapagoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/509f4e1c-a86d-41d2-8bed-61e6d444749c/79687581522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda69cc9-26c3-41c7-8361-b6d158289738/guroz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c7585a-5ef1-482b-8344-04ebbc3d34c5/gedezibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a82264-71a3-43d8-bd90-4642f05e21f7/jepuloduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fd56d02-a095-42c7-8d41-f645b767ebb0/rijuvapefelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6804b928-eee0-4e47-928b-5b59abd0498d/71014901079.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_off0000704b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x704B 5540 bytes
SHA-256: 1188e98b3730c8af4f9ced354537ed49f0098d24275a664cde284dc77f0ad33e
font_01_sfnt_off00008306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8306 10252 bytes
SHA-256: 86bc1f64aec8177911d85b95ae080d375f2b52a6ccad138776f0495edf4216c9