Malicious PDF — malware analysis report

Static analysis result for SHA-256 3726218b3702624c…

MALICIOUS

PDF

51.0 KB Created: 2020-11-02 11:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e892938275e6cc56ceac30b406cf43fa SHA-1: 9c5ce37faf0d001be81768ca68ce564b1fef9e53 SHA-256: 3726218b3702624ccc484fd6a820ee34ab2d6f90c51a70591a32a88d534109a3
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://ttraff.link/123?keyword=general+cover+letter+ideas In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7ca40e96-6470-42dd-8b7b-369c44603e3c/3962796810.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3460/5725/files/tv_tropes_pathfinder_iconics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb8628d-e54c-45b4-a3a7-14af0314c302/zibukazuminozumumikizogan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3888/9891/files/cnn_10_-_september_19_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/terrarium_tv_apk_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9382/3139/files/unit_10_level_c_synonyms_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/metroid_nes_rom_fr.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/79725312014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4359/3109/files/33084906274.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/basic_electrical_engineering_book_pune_university.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/pdf_of_biochemistry_by_satyanarayana.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/practical_reliability_engineering_fifth_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b9edbd-df05-4511-9d57-a76812233292/regras_do_monopoly_milionrio.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/romoridejefexovixajav.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7484 4812 bytes
SHA-256: 0a90ad744c0b542a7d7c99f0e52bc2bfc37a38cb8ac9ca960a5335b505b14f55
font_01_sfnt_off000084e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E1 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00008d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6F 10464 bytes
SHA-256: 6457749c78c74f2c67d07e856f3c87335d20b17ff8ae96582de342e12dacd864
font_03_sfnt_off0000b081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB081 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

Open this report in the interactive analyzer, or submit your own file for analysis.