Malicious PDF — malware analysis report

Static analysis result for SHA-256 340ce92c45c3f657…

MALICIOUS

PDF

45.1 KB Created: 2020-10-19 06:34:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0c9dfbe03bd278d8ed120473a9766e7e SHA-1: 98f344f0dd0e10d4547eff48f2e08ee804c0cbd0 SHA-256: 340ce92c45c3f6579cec13e5355484cc93868673dfeb667d0e33d90e36fee96c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'good food guide', likely intended to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.me/123?keyword=brisbane+times+good+food+guide+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f88ef5809b92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f877c1cf1f7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f874a1622f4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f87187fbca9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f87271762e3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f88d3c60dd8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f8b047a671c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f88545d91563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_5f89452998fcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f89dc2ab1bec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1808/4771/files/chaos_faction_2_hacked_online_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/5171/7286/files/88956067775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8017/9107/files/qin_dynasty_economic_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9236/8796/files/dark_beast_range_guide_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0878/9150/files/internal_combustion_engine_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4080/2469/files/tommee_tippee_variflow_teats_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9541/5189/files/feroxebalemerotosibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4664/1060/files/group_model_release_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4af77fd-cc22-4e75-93f2-1ef2d1c843b9/xarawejejo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b72904b7-95b9-4c76-b52b-7a39d10db23e/wagopabikasuxilet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffbd7285-be32-4297-a0f7-cf4c7d7e7f2c/24153422660.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_off0000712b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712B 5660 bytes
SHA-256: 5c2f9d66231c9765496ef08fd1c0d12b11ba6ec62f950bcfcb754d241984ffe4
font_01_sfnt_off0000844d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x844D 10120 bytes
SHA-256: bc1f901489338e627d10686377fee7207774f5541cd8cec8b8075de88d1e9cd6

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