Malicious PDF — malware analysis report

Static analysis result for SHA-256 218d1c870256cc63…

MALICIOUS

PDF

42.6 KB Created: 2020-10-30 07:39:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 88e1094d8100f77b6aab1486b491c192 SHA-1: b755358d6682988d88f51c9a4a1ec71a5e86d94b SHA-256: 218d1c870256cc63d36ff80d0c12b57be40189094bdb3dad62ed109006bd1c9b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. The presence of numerous PDF links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.link/123?keyword=words+of+praises+to+god In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/4f622.pdfIn PDF document text
    • https://zijovegumasapal.weebly.com/uploads/1/3/4/3/134307166/sabetonoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_5f983cdc61342.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/76e4e70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f897e6fac75d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/printable_calligraphy_alphabet_practice_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3a91bd-954a-43fa-930f-e94cbdff3f3f/2504246180.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/91286817264.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/begegifijejukesigixile.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/51145203683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6dfa82-f442-41d0-b283-e94f6c6786cc/rekiwugunekiwawoxuwesod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3482b93-4df6-4e37-83e9-af73539b7a0e/ragnarok_m_hunter_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/93244976852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/905cd27b-ab79-488c-9583-a00ba3959e82/xajigalamotajametufuw.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A0 5188 bytes
SHA-256: f03645fec8be68074934aecf871f8e9f37cd9f22a3b622bd577bdd00d4360b76
font_01_sfnt_off00007966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7966 10632 bytes
SHA-256: 1683c53da3c51d084de9362f90f6249cf9035210a46555fd7ef8896ce14791b1

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