Malicious PDF — malware analysis report

Static analysis result for SHA-256 b33817aba39119bb…

MALICIOUS

PDF

66.1 KB Created: 2020-11-03 00:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 606b2ccf49afd133f917d6663ae4d2a6 SHA-1: 103856d225b2c1783e8cd0d73674ffb95c489f15 SHA-256: b33817aba39119bb47a93f569a0342925b37ada6de4def184a9d837b18563438
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://ggtraff.ru/aws?keyword=manchester+by+the+sea+film+analysis In PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5f9263be4f659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369904/normal_5f8df48e62f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411481/normal_5f95c5b7b2b0b.pdfIn 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/0482acdc-1d0c-48a8-8f83-bfd08a37e63c/dragon_ball_xenoverse_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e919d43-e05a-42cd-af24-95ce5e090b29/21768448637.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/cahier_journal_vierge.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/tefamugulalepojizetaluwis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6450e2b-0ecf-4abf-9158-d22ef02f6e84/dotepexupaxurupeximar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5388/files/solicit_letter_for_christmas.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/89010819561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd64d4ff-335b-4fdb-bd77-c719cd48b877/lozesosojur.pdfIn PDF document text
    • https://s3.amazonaws.com/felijaziremole/juzano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5294/0968/files/convert_to_word_2020_document.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/62995950503.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_off0000b496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB496 5044 bytes
SHA-256: 0729a1f4cf3a40dac16d125e1d84e5d81877e2715f0089422636e3e5f041eaef
font_01_sfnt_off0000c587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC587 11944 bytes
SHA-256: 6d746d9aeba34b7ef4a594b6177296e27247336dd2f87149f35996c57f1927e1
font_02_sfnt_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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