Malicious PDF — malware analysis report

Static analysis result for SHA-256 98509587ba01d7f4…

MALICIOUS

PDF

38.6 KB Created: 2020-10-29 02:51:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b3b57a6ee21cc66d970c53ba094f9de7 SHA-1: c8d3b82cbd6690061c961e4d745118b1fdfa717c SHA-256: 98509587ba01d7f4012a40b935913faa3218d3c2b63fb69abcf3aa3b8ec8dbd0
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 other PDFs hosted on various platforms, suggesting a link farm designed for SEO manipulation or to obscure malicious destinations. One of these links, https://ttraff.cc/123?keyword=how+to+work+a+room+susan+roane+pdf+download, is identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

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.cc/123?keyword=how+to+work+a+room+susan+roane+pdf+download In PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/ledisuwewakef_lejikirusirurix_jomoj_vitemezaxot.pdfIn PDF document text
    • https://xififaxapid.weebly.com/uploads/1/3/4/3/134344339/kozuzijase_ketaxuxewewikir_lemuvu_roleki.pdfIn PDF document text
    • https://fawefugixizim.weebly.com/uploads/1/3/1/3/131383791/vakotivim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378171/normal_5f8fc4f0b8444.pdfIn PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/9309f71f.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/9895647.pdfIn PDF document text
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/sebupisum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387819/normal_5f953cbeebfa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f8923f29b21e.pdfIn PDF document text
    • https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/pojowapugop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385617/normal_5f8cba2da2584.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/c99bd2b4-3f79-4352-b3a1-163b67c07f37/30239371933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0250/5633/files/chris_p_bacon_news_reporter_fired.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fea42c8-3159-455c-945c-a4088db4ae44/amendments_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5291/9703/files/sugupegod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7660/8685/files/new_oxford_picture_dictionary_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8081/9894/files/cantos_apropiados_para_misas_de_confirmaciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1954a0c-366a-43b3-a24e-77f49bdd45c1/love_is_a_losing_game_lyrics_greek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/28632778080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5484fbd5-782b-4e4d-99ef-1ff09e813b59/viwevasamuvuwuwabulogepis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a9577f-9570-4240-9751-1f6d611cdb2a/jogenopejokosovulizezire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/284d6506-b798-412a-8008-6696209f73ff/the_lion_king_full_movie_unblocked_free_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8802304-c556-4d96-bf70-4074c537aa7b/35769840775.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_off00005a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A00 5304 bytes
SHA-256: 15a479b4fa4b8f89830d886274fca7766d9e9248c77f376767f0d69a5546c2e8
font_01_sfnt_off00006c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C09 9552 bytes
SHA-256: 0fe5ffac2437de837a416b0e4c53ee16118cbc4cfe4daa4dae845dbee49ceedd

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