Malicious PDF — malware analysis report

Static analysis result for SHA-256 112d2940a7d91ee7…

MALICIOUS

PDF

47.6 KB Created: 2020-11-03 00:17:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f921744d88d2a71e3ef04bd1dcc9ca60 SHA-1: 240bae07edc13f9034b9c14c4abeec19bffc5715 SHA-256: 112d2940a7d91ee7c820788eb538ca2f5d7bea622f12663ee9160e112a199207
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/123?keyword=jr+ward+dark+lover+pdf In PDF document text
    • https://mufalugibesenu.weebly.com/uploads/1/3/1/4/131453255/tisonanoxurewubanupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f877f945e76f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378149/normal_5f9b0204aa45b.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/3cff3eac-8b91-46d0-b235-416316800b86/52755435469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3ffd438-ad7a-4935-9427-d1056869ceaf/search_for_clues_to_the_keepers_whereabouts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8588/2048/files/80324947573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac8393c-0e90-4a1f-8c12-4941d1074950/xuxowifisowilad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc197ec-d6bf-45ce-bb88-7df552cbf149/star_wars_storyboards.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c73d3d1c-ce02-4f14-a0c8-587e14c82906/437573854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9550/6592/files/daedalus_and_icarus_english_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a4c09b-8669-4fdb-b02f-3124d587ed15/21841843895.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8C 3252 bytes
SHA-256: 1d608edccbb49a5ba78b05333d9ee68ae3eae9f59f19e5c1bb0536c8f356c6e7
font_01_sfnt_off00007718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7718 5060 bytes
SHA-256: 4c47f1f090780ae52e272e25160f695ab12848761a4c647df020a3df3f0b95d9
font_02_sfnt_off00008883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8883 12640 bytes
SHA-256: 901fd7d2b0387d39cb6f68aaf517ba8c0e48cefe9799207c889879ccef1134d7

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