Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c42aae378139c09…

MALICIOUS

PDF

43.8 KB Created: 2020-11-03 02:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 90e8cd4fffa5f8eb54a0500227316d31 SHA-1: d7f9a354428b0fafe5691ff7e9d7ce2910b8a757 SHA-256: 1c42aae378139c09db5253585742defa2c47136770268051ce7f93325b9fd4ff
132 Risk Score

Malware Insights

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

The PDF document contains embedded links, one of which points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'mobile home purchase and sale agreement' and the malicious URL, suggesting a phishing or scam lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=mobile+home+purchase+and+sale+agreement In PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/togajofap-naduxu-nojeresa-tuvulebuva.pdfIn PDF document text
    • https://kudumegowejo.weebly.com/uploads/1/3/4/2/134266354/9971239.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/51200f.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/2410368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5f92439ac4620.pdfIn PDF document text
    • https://kivuligob.weebly.com/uploads/1/3/0/8/130874143/mokiwated.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/96320de2-88b4-433a-b156-67484b1df4b8/54470457175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d56685d0-1a0b-453e-96f4-115dd3e588af/35335843124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ceecb9-4fb1-4e48-80cc-900234076215/retogivepowijepovidulofex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45905f82-cea7-4580-877d-7693765d4998/palabras_basicas_en_frances_con_su_pronunciacion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/hum_aapko_miss_kar_rahe_hain.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_off00006c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0D 5632 bytes
SHA-256: 37bb609f2312dfe828119b1ac0020a686a2a2ba1e7a8f6f1d9aafd4785bb5f21
font_01_sfnt_off00007f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F09 10276 bytes
SHA-256: 6681b58a2c0f227a0f99ef5287953237d6735cc84d9c09770aa749868304b07c