Malicious PDF — malware analysis report

Static analysis result for SHA-256 48bde23e6d23f6c0…

MALICIOUS

PDF

36.4 KB Created: 2020-11-02 11:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 500e85dbee53c889d248c51956e743bb SHA-1: ed1bbd3c7b817ffb4b6bc09b6863e9595d3c9ebf SHA-256: 48bde23e6d23f6c0b6198a1efc2cee61bcaad6b1cf1bd825ad11f484d00cf72a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Pokemon pss icon'. The presence of a link farm and a critical heuristic firing for malicious redirector links indicates an attempt to drive users to malicious infrastructure. The primary IOC is the malicious redirector URL.

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.com/123?keyword=pokemon+pss+icon In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5f8c5c4a229a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_5f996f9524e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_5f8e81d880cfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417319/normal_5f99e92b4d08e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f88321a0ee57.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/1c37adf1-5f7b-4861-87b3-a524c090ca50/zokiluvagedenituni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1701/8267/files/water_sw_open_rheem_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d78a36d-2757-416c-b652-bd7a1df8e7b3/microsoft_office_2013_torrent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49fd43d7-b2fd-4733-96c9-b4b91ad473ec/57575104240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df74c82-96a3-4fa6-878a-cd3ac7348d09/fetimuvotuvew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/6102/4185/files/53378729291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7498/5375/files/farmer_giles_of_ham.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7257/8220/files/drug_revolving_fund_in_nigeria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3046db0a-c1fd-4aae-a828-780366ff0c0b/87072532271.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_off0000501d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x501D 4804 bytes
SHA-256: 14286222c4a0d36f257e6aad6d1620dc9fdb3e1c09a177e3665bc0952656f7b2
font_01_sfnt_off00006075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6075 10924 bytes
SHA-256: f37d9b443286445ed8d8ea64152d93347697616e8cba12449c9a7be05d12d09c

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