Malicious PDF — malware analysis report

Static analysis result for SHA-256 96545246adc95547…

MALICIOUS

PDF

37.8 KB Created: 2020-11-07 01:20:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba1a3326716f6acdd83dd31fcb749cb5 SHA-1: 1a1e930dacfc8bd7fbcad83913de6451fa487eca SHA-256: 96545246adc955477b102cb1393615970d44876555a33085d4f07ad2c281bf67
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body contains URLs that appear to be part of a link farm or SEO poisoning attempt, aiming to lure users 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://ggtraff.ru/aws?keyword=unblocked+6969+sprinter
    • https://nugesipepisi.weebly.com/uploads/1/3/4/0/134042061/45f9cc37382.pdf
    • https://cdn-cms.f-static.net/uploads/4410448/normal_5f9f727436d7f.pdf
    • https://cdn-cms.f-static.net/uploads/4451028/normal_5fa56e98eaa76.pdf
    • https://cdn-cms.f-static.net/uploads/4422912/normal_5f96c7b561dc9.pdf
    • https://cdn-cms.f-static.net/uploads/4371523/normal_5f9bd21c81d28.pdf
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f9087c8bc07c.pdf
    • https://cdn-cms.f-static.net/uploads/4425768/normal_5fa344202d19b.pdf
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f885ba2bed39.pdf
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5fa07580e54c0.pdf
    • https://guvemixekowarov.weebly.com/uploads/1/3/4/6/134686109/3245099.pdf
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8c865a59644.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/remeranexe/tratamento_bursite_ombro.pdf
    • https://s3.amazonaws.com/fakuguvil/centroid_formulas_for_different_shapes.pdf
    • https://s3.amazonaws.com/zetare/kafuzopepaminibeputex.pdf
    • https://uploads.strikinglycdn.com/files/3bc29d08-791f-4714-a668-a9ab9eeff65d/43049771968.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054d3.bin
be60234dca1341da3f3d4e542598e2e98797e7ed7f901d86d6cc575b1e567c2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x54D3 5364 bytes
font_01_sfnt_off00006719.bin
b24e76aa96df15dd9dc009677404d15370854d98019cdb84b6f875b79c1f1b1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6719 10472 bytes