Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd288d318c8acd9…

MALICIOUS

PDF

44.5 KB Created: 2020-10-14 07:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 707249495f5bd30c769409baabf71f26 SHA-1: 30bb492189cec4628f47011f2cf1d2db67b63db4 SHA-256: 3fd288d318c8acd91c699d8f4600e76af21edd3d3d95e543aa74dca1c035e23e
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious due to its function as a link farm. It contains numerous embedded URLs that redirect to potentially malicious content, including a known malicious redirector and other PDFs hosted on disposable or compromised platforms. The ML classifier strongly supports this assessment, and the structure indicates an attempt to lure users to external, untrusted resources.

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=tormenta+rpg+classe+de+prestigio+pdf In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7904132.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/93049f265a0000.pdfIn PDF document text
    • https://site-1039737.mozfiles.com/files/1039737/39169991960.pdfIn PDF document text
    • https://site-1048190.mozfiles.com/files/1048190/19390368558.pdfIn PDF document text
    • https://site-1042492.mozfiles.com/files/1042492/zajolipopawo.pdfIn PDF document text
    • https://site-1038529.mozfiles.com/files/1038529/47460357752.pdfIn PDF document text
    • https://site-1037276.mozfiles.com/files/1037276/75248905886.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/17666a36-51d6-471d-aca6-2c7072debc84/54560572588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e54b8d1c-1650-4119-8a1f-73f32b1ba592/74002494099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4529fbe-9e16-495c-aedd-c87d27ac0d99/gowazilobexen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75553d9e-e8a1-4ce8-9ab4-bb19920ee7b6/762297104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f7dcf2-1711-4734-8258-9826898744f1/sebafenefifilililunuzim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3997/6345/files/tufinibamejofananibile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1386/5124/files/lego_how_to_train_your_dragon_toothless.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4584/1827/files/south_hadley_high_school_summer_reading.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_off00006f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6A 5424 bytes
SHA-256: 9b723b1ace569704d6a4f4d4e37e72d3390365a5fe9cc7a8555f8f08100febf9
font_01_sfnt_off000081bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BB 9800 bytes
SHA-256: 92bdf31bb5b27e65ef9f5c6791641e0f1239545f5e11a4d754717cbfb32653fd

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