Malicious PDF — malware analysis report

Static analysis result for SHA-256 0afb5c028f800c00…

MALICIOUS

PDF

85.0 KB Created: 2020-10-31 03:45:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3f9d91104117bfbe98f7a25e8c4c22d5 SHA-1: d84cebced4768d232c4d9dc9097962770dc35e25 SHA-256: 0afb5c028f800c009d5ca5463772755fcf414839acc59b267117a80ba64e8e16
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/aws?keyword=billie+jean+meaning In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f9c7c7f0d221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9159/3883/files/android_10_samsung_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/volume_and_surface_area_of_3d_shapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46faea1-ac78-455a-98f5-6bbb29a53e83/52573145632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7532c585-33a4-421a-a607-c20ab3dfe698/73557218021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1275/8426/files/logger_buffer_size_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/3390/8123/files/conditional_acceptance_letter_to_company.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b796684-6a5d-4559-9d96-66176b9e2603/54512564166.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/hooked_mod_apk_4.1.1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2581/1624/files/cheesecake_factory_application_test_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5839/7094/files/contact_harvest.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1679/7857/files/communist_manifesto_in_bengali_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/77189829732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/960c11f1-5a83-4f8c-874b-20a6e6fe6fe2/66632421093.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 4856 bytes
SHA-256: c03fb7a8bd62e1150deb36b5af70601a723e1f91f33737c0c1b2b1121e212000
font_01_sfnt_off00010c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C46 6068 bytes
SHA-256: d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd
font_02_sfnt_off00011bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF7 13464 bytes
SHA-256: 66b7c326f102c61caea94e1114356198332ae396d32e76f9521e10e0f0d8c50a

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