Malicious PDF — malware analysis report

Static analysis result for SHA-256 88fe7372d4df10a3…

MALICIOUS

PDF

45.8 KB Created: 2020-09-30 12:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1ad452c0e7b8147344955f994196a70d SHA-1: 6852740cd2ac3a9704a2d180868c9ad3f6108175 SHA-256: 88fe7372d4df10a3b37d51d17332b2ea77d61172c08e3b42e7e2bfeb9e5bec59
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests a tactic to disguise malicious intent within a larger collection of links. The ML classifier also strongly indicated maliciousness.

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/strik?keyword=anzaldua+borderlands+pdf In PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/zawixejezodebitizovogodet.pdfIn PDF document text
    • http://netuborov.narrinspices.com/uploads/1/3/2/7/132741100/0fa5b25a749e74.pdfIn PDF document text
    • http://fomofew.la-cooking.com/uploads/1/3/2/3/132303307/sowenapivutelibefe.pdfIn PDF document text
    • http://lujaxef.cuttingboardswi.com/uploads/1/3/0/9/130969383/96a8b47942c.pdfIn PDF document text
    • http://potax.asliceofpierolla.com/uploads/1/3/2/7/132710797/31635fe0.pdfIn PDF document text
    • http://kakesa.thenoahcode.com/uploads/1/3/1/0/131070001/xexosagurefole-pavoritul-rixemizodeger.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/1/0430/4135/7977/files/texas_rental_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7607/3125/files/sous_vide_instant_pot_duo_plus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/buxubesenudetan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/timberline_chainsaw_sharpener_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4550/9537/files/aihwa_ong.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a44f40e7-067f-4250-ae85-27a0e01e91c9/terimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb31ec5-1213-47e8-badd-7035ea132a77/wuvidikisomapijidiwisig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24a4dfe1-a5d7-4b74-bf90-36c5eea0e84f/86649306478.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_off000068ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68ED 4968 bytes
SHA-256: a1676fa9e64db24b395a5972162b083f51c9d5e162439c40f5c8feda752f1cff
font_01_sfnt_off000079cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79CC 10160 bytes
SHA-256: e55a9ac3904bf94538cbef7498f0efc58ed06345deda94a6264819d047a4a2d0
font_02_sfnt_off00009caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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