Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e3f2f7830091a0…

MALICIOUS

PDF

47.2 KB Created: 2020-09-29 23:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 086aa07dd319fb63b77136931db0cc68 SHA-1: e24851aab4db4ba33cdbb7dee728b5e2079f9874 SHA-256: 63e3f2f7830091a04b0deef0f6ca6a7a197599c10c7d1574708d539244bb5a79
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and flagged as part of a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at 'ggtraff.ru'. The document body, though heavily obfuscated, contains text related to resizing PDFs and includes the same malicious URL, suggesting a lure to trick users into visiting potentially harmful sites for phishing or malware delivery.

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/strik?keyword=resize+pdf+size+mac In PDF document text
    • https://site-1036737.mozfiles.com/files/1036737/toxojusapofovora.pdfIn PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/wurawusesotivud.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/64339877286.pdfIn PDF document text
    • http://besezuti.engraverdavid.com/uploads/1/3/1/6/131606111/vetomavimapumevivof.pdfIn PDF document text
    • http://kagokawi.dumasmuseumandartcenter.org/uploads/1/3/1/4/131406082/e2ad72d1.pdfIn PDF document text
    • http://files.magnolianaturalmedicine.com/uploads/1/3/1/4/131454440/9989008.pdfIn PDF document text
    • http://files.qm-auto.com/uploads/1/3/1/4/131482952/wopovolabakipifikipe.pdfIn PDF document text
    • http://files.mcfrancodeleon.com/uploads/1/3/1/3/131378993/3948946.pdfIn PDF document text
    • http://files.lindavergnani.com/uploads/1/3/0/8/130873769/425002.pdfIn PDF document text
    • http://files.accentmakeup.com/uploads/1/3/2/7/132740905/8604980.pdfIn PDF document text
    • http://rojogo.bodysoulsalon.com/uploads/1/3/0/7/130776007/bitovixoxe.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/1/0428/8312/1319/files/bamobavuvor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7872/7318/files/long_ju_mit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6527/3248/files/ghoulia_yelps_gloom_beach.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_off00006ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF5 4720 bytes
SHA-256: 0c31b63c8af9fc48096eee91c1cf4d9f6d0c903389bfbfa1ed7a237d4bc079dd
font_01_sfnt_off00007f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0F 10336 bytes
SHA-256: 84c4742066c4bf32bba381052c3e69eeaf73c8f3d1236640e2dea3900452441c
font_02_sfnt_off0000a246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA246 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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