Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a0adf19d4d9125…

MALICIOUS

PDF

37.3 KB Created: 2020-11-01 00:45:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 26f128ebd1125bdeb4f7034afec200c5 SHA-1: aec63ed983330988e1c5ca303fefe6fcec97e633 SHA-256: e9a0adf19d4d9125ea2e4c44f0af3e95aac988516081c3d959ada3e33704015f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to `https://gettraff.ru/aws?keyword=pablo+neruda+we+are+many+spanish`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to other PDF documents, some of which are hosted on S3 buckets. This suggests an attempt to manipulate search engine results or distribute further malicious content.

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=pablo+neruda+we+are+many+spanish In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fulomufimikim/cursive_font_generator_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8818c88-f134-4ddf-9f39-0637c52c8c13/tazifodiluwos.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/alabama_abortion_law_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2171/1532/files/mary_poppins_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f7a7c9e-a779-4bdf-af2c-6b17b5bbd152/l200_foam_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/bitlife_guide_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/95994151266.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/97997585351.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/kugivumutimerazixefokerer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e877daf5-fd37-47b4-807b-d8e967e18258/2521159317.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/the_last_stand_union_city_hacked_cheats.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/arnaud_desjardins_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/60910315676.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_off000052bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52BD 5532 bytes
SHA-256: a2217d9405ba914110bf6d2855ad694b0256f453dd00ff6fdafe8dfcb68a8129
font_01_sfnt_off0000656b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656B 10476 bytes
SHA-256: 0e04445b175e36c02c8090ff106eabf02aeaaf8157281aed26c667292c15dab9

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