Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8fbfafc0d0f6664…

MALICIOUS

PDF

52.0 KB Created: 2020-10-30 20:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1069c191e7311de29674175a5bca5067 SHA-1: 3257653381162e2e6b8b6ce727833cfd1b746840 SHA-256: c8fbfafc0d0f666453103df074afe64549ba95eca56264c626cebe7f117362a1
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of embedded links, functioning as a link farm. One of the primary links, 'https://cctraff.ru/pify?keyword=breitung+township+schools+calendar+woodland+elementary', redirects to known malicious infrastructure, indicating a phishing or malware distribution attempt. The document's structure and numerous external links suggest it is designed to lure users to potentially harmful content.

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://cctraff.ru/pify?keyword=breitung+township+schools+calendar+woodland+elementary In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381738/normal_5f953fa69c889.pdfIn PDF document text
    • https://pakedarisibibo.weebly.com/uploads/1/3/4/5/134501134/gutomavenavuj_vimugokej.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/0a767e5f6b29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5f9b18a951eb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5f8ebdc348be4.pdfIn PDF document text
    • https://gujojiri.weebly.com/uploads/1/3/4/4/134434224/mukarurudunapapalob.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/zezasajikuwew.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://uploads.strikinglycdn.com/files/f956e4cf-0db6-4ae8-82a0-f2dc17a8754a/sally-_gay_mccann.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438cff39-6258-442c-a5ee-7fe5ea5f5c53/pavawamovebeziru.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/41636930540.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/15388107165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dcfd626-50cd-498e-bee0-b2cf8de709f6/63962795946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84d32fd2-f719-4b07-91d6-32cdb067de3d/ripanap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd172522-4a55-406e-87d0-40029292c9d2/what_is_dcr_on_computer_monitor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8113/0680/files/healing_prayer_points.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_off00007b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6D 5612 bytes
SHA-256: 3e2980900fced64c723961026501b815b1d095bca4ea54320c54de50a4600d0c
font_01_sfnt_off00008e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6E 11216 bytes
SHA-256: f8f9cb78f31807605eda24a4f789fede543458a64884978800424799d041fdaa
font_02_sfnt_off0000b48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB48F 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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