Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2cd40ccd3000b73…

MALICIOUS

PDF

60.8 KB Created: 2020-11-24 16:50:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d369679ebb78d39582de393b6eeaa465 SHA-1: 3d922e74afea212b9f563c8948ce4201abd3ebef SHA-256: e2cd40ccd3000b73fbfb35fbf6cc23dcdef572e1d16664b8a5fa81c0b15b1c09
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirect to malicious infrastructure. The primary malicious URL identified is 'https://traffmen.ru/123?utm_term=baby%2527s+handprint+kit+instructions', which is flagged as a known malicious redirector. This suggests the document is designed to lead users to harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffmen.ru/123?utm_term=baby%2527s+handprint+kit+instructions In PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/7639485.pdfIn PDF document text
    • https://gejekawuxo.weebly.com/uploads/1/3/4/4/134497426/nukipelogonimifuxu.pdfIn PDF document text
    • https://bowiromifax.weebly.com/uploads/1/3/4/6/134613330/kifolobigidok.pdfIn PDF document text
    • https://sogokuwuze.weebly.com/uploads/1/3/4/5/134500874/77572b1a5f8f38.pdfIn PDF document text
    • https://gukijofajileraw.weebly.com/uploads/1/3/4/3/134392650/gaxawuxezije.pdfIn PDF document text
    • https://vufizirisabewi.weebly.com/uploads/1/3/4/4/134443644/fopejumezaropakuro.pdfIn PDF document text
    • https://xinejusitap.weebly.com/uploads/1/3/4/6/134630468/6886119.pdfIn PDF document text
    • https://sosalikibagog.weebly.com/uploads/1/3/4/8/134856993/4996571.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43ea224-20f1-43cc-abf3-7da0b2406002/.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/lexical_and_grammatical_categories.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/30052442131.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17ece919-eadd-4fca-acc5-36dd2096c93c/rijamaberumelimuxuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9db908-72cd-4bdd-b619-dfe39578a528/ucf_cs_electives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d6f03a9-965f-4173-bc3a-795e84ea647a/13594352903.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25dcecca-5cbc-45bd-b448-67f5cb686f1e/misujufob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eed5fc7-cfd4-4396-aaf2-6c234a406a4e/luzevirazunuvotu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE26 5516 bytes
SHA-256: ea97bb8875b551cf105900be7dcafb3f343ef3255c589cd1320ba77e7f95e92b
font_01_sfnt_off0000c0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0E8 10868 bytes
SHA-256: ac6ef51fe4230f91289d0c0cf710081a2c5d5fcdb730368cb727b5f9f0756c1b