Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bdfd49d260ac79b…

MALICIOUS

PDF

57.1 KB Created: 2020-11-04 15:57:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0ffbbacc144857825ce755b092edfe8d SHA-1: e9fdad5b2cd486f7301d5bf2a36c48070dbab7fe SHA-256: 2bdfd49d260ac79b3dda1ef698d84cfad0317e1cf32953b7cf224e5a0765bd9f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a keyword suggesting a printable schedule. The PDF also hosts a link farm with numerous external PDF links, indicating a potential SEO poisoning or content farm strategy. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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=printable+la+dodgers+2020+home+game+schedule In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384820/normal_5f9329ebc38f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f8a0655bfa83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419225/normal_5f9a0b3f5721d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418557/normal_5f9a36d4d16bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5f9e1d44bd0b9.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/zalomi/rolaxexenevonib.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/pezeveriwulewezodevawoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7746/8327/files/haier_ac_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/antony_and_cleopatra_full_play.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/samsung_giga_sound_blast_mini_hifi_system_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/zazowij.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/farley_elementary_school_hudson_ma_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/8842/1282/files/saxugufokaxa.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_off00008f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9E 3488 bytes
SHA-256: 9a7f6e43e9b1a16407563355e91c3b30aa3ea8c38a1e5aeead3021d82721f27e
font_01_sfnt_off00009c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C14 5768 bytes
SHA-256: ca561bacafe4881d7c8960dc226aecbb9c413bf80baa64a554be000b618c6881
font_02_sfnt_off0000af8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8B 10924 bytes
SHA-256: e4c826e39212167d702b9da4b1011d781727438c5f87d8eb14b71cee2821886a

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