Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77ad55c95a96728…

MALICIOUS

PDF

42.4 KB Created: 2020-10-31 03:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 43e0fbea30e08d79da3a52383366b14b SHA-1: dabc32da308c16743222ea24fee0a42d0bd68e81 SHA-256: a77ad55c95a96728621b117612dd7a43b7ab51c0b315be77e39aa32b1697df01
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.ru/123?keyword=csr+racing+2+mod+money+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f87354c1c60f.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/1a288a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_5f9a83f761fee.pdfIn PDF document text
    • https://fomukudir.weebly.com/uploads/1/3/4/4/134403856/galeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372960/normal_5f88a7b0b17b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393647/normal_5f90a8726910e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f9647897fd00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_5f8c97cfa017d.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/1/0497/5060/5988/files/15328329222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/5954/2947/files/identify_complete_and_incomplete_sentences_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/74047463174.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/82817203700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3335/2086/files/45939597313.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 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57C3 5392 bytes
SHA-256: 4e6db9c1f82335d20b9c49fb9d0ad9120cc8c418d28329ca7d1bd3b03a038370
font_01_sfnt_off000069fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FC 10804 bytes
SHA-256: c5316875d28fa7fe06e2552923d841d847b44b077a660e1388f7c31af2b613e2
font_02_sfnt_off00008f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F13 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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