Malicious PDF — malware analysis report

Static analysis result for SHA-256 0afaabe025054a8e…

MALICIOUS

PDF

48.5 KB Created: 2020-10-11 17:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eebeb909d0efeea7b2030517891aaf5b SHA-1: 5bd62bf6d2ffd234bd00d9381ea17e98bbe43d79 SHA-256: 0afaabe025054a8e516594d92f878bd5fed6cdd8654c2355f9c81846b35fd032
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links pointing to various domains, many of which are hosted on disposable infrastructure. One critical heuristic identified a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. These factors suggest the document is designed to direct users to potentially harmful websites, possibly for phishing or distributing further malware.

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://ttraff.link/pify?keyword=stabilus+lift+o+mat+17+inch In PDF document text
    • http://zifuguba.sincerelyalana.org/uploads/1/3/1/4/131482826/nuwinupomabagikegadi.pdfIn PDF document text
    • http://gegoje.injectafloor.com/uploads/1/3/2/7/132740564/bezetediselakudope.pdfIn PDF document text
    • http://files.rachelriley.net/uploads/1/3/1/0/131070173/329456.pdfIn PDF document text
    • http://jexoja.allresults.com/uploads/1/3/1/3/131398285/wasovedotetozun-loxitizuvanuji-tirudenot.pdfIn PDF document text
    • http://mimimi.thekrcshop.com/uploads/1/3/1/4/131454012/wunimozixu_wolatadi.pdfIn PDF document text
    • http://files.katshelter.com/uploads/1/3/0/8/130813141/1234967.pdfIn PDF document text
    • http://files.korinafloresluna.com/uploads/1/3/1/4/131406478/8901453.pdfIn PDF document text
    • http://mokiji.lidgettandbeyond.org/uploads/1/3/1/4/131453284/jewovixulosu.pdfIn PDF document text
    • http://jazomu.porterridgeband.org/uploads/1/3/1/4/131453175/nakimilel_zifuxelurugu.pdfIn PDF document text
    • http://wegefup.thevalleyriders.com/uploads/1/3/1/8/131856077/9226746.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/1/0483/7510/3637/files/cricket_doll_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9424/0151/files/56838837189.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_off00007288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7288 5164 bytes
SHA-256: 9eed09ab03cee37fc6a992b4d3afb2d8df39817f2e288565d441c09fa21b019c
font_01_sfnt_off000083ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EC 10356 bytes
SHA-256: b6447183f0935fe141a29918f6fb5d12a65a1f98b269a01ba1c6f8274a15d5ed
font_02_sfnt_off0000a755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA755 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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