Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e3753c886287c83…

MALICIOUS

PDF

49.8 KB Created: 2020-11-05 02:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6163556077d9662e736f35d6dd7612c9 SHA-1: 98aba5c49dbc3531c81c46a6f8f8e53bdd224619 SHA-256: 1e3753c886287c837e756ba04c587097b740a47c035f5b67595b823edb0d8b36
124 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.cc/123?keyword=sony+handycam+hdr+pj275+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459482/normal_5fa34b558d8e6.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/vapew.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/vilusiximezukowola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f89e3411792c.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • https://denibizokitig.weebly.com/uploads/1/3/4/3/134340328/bf2c2c4.pdfIn PDF document text
    • https://renibopasuviwi.weebly.com/uploads/1/3/4/3/134305424/kuvagesuwut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5fa33e8126c0e.pdfIn PDF document text
    • https://konanofekevofi.weebly.com/uploads/1/3/4/3/134367310/darevomeralage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_5fa0649a0bbab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371258/normal_5f9332ca4e40c.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://cdn.shopify.com/s/files/1/0496/4456/8739/files/4658998090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/684b7227-e537-43cc-8844-2d5fb7f1fac4/53183288827.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_off00007618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7618 5388 bytes
SHA-256: 4881341afe077c6bf073753ba5c20ba19c643073e45bd6451367aae8b9d9e6c9
font_01_sfnt_off00008843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8843 10456 bytes
SHA-256: b250999df93023903e9dc8c65023cdef1d9f5d4ed7030e2bad908a2b60c81142
font_02_sfnt_off0000abd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABD1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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