Malicious PDF — malware analysis report

Static analysis result for SHA-256 973ec63c5d1a2a68…

MALICIOUS

PDF

38.1 KB Created: 2020-10-18 05:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: aa702d27b88ff9fb27ebf0bfb4d0b4fb SHA-1: 362c5972e79eddcda4c32e61b649a52ac3373594 SHA-256: 973ec63c5d1a2a681aaacd0936a141936325923109d60d844cd4158fd8de886d
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external websites. One of these links, 'https://ttraff.com/123?keyword=lg+smart+share+apk+android', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document's structure suggests it's designed to lure users into clicking these links, potentially leading to further malicious activity.

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 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://ttraff.com/123?keyword=lg+smart+share+apk+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f889c0b299e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5f8b9e2188eb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366633/normal_5f875c7ec1518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f874a14a4067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f892ab70333f.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/tebavu_mofevuz_punoxibera_gijipomole.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/5153398.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/febafd3d195a9.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/5717a5621b69.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/8737190.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/rikofuxotekikolojovu.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/ec2a272b2e40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1328/1691/files/1614278281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4738/2940/files/folli_follie_watches_new_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc4b22f-7739-4e99-8b19-54baf931c2d0/dabisonorulitapibobon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d824261-7cf4-4443-8932-c985fc140795/kiliferem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc136ee2-7328-4311-bdf1-a59aa94da196/88800644116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6abcdc22-5761-4280-8d39-ef9ac5c82613/32987326068.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_off000055e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55E7 5344 bytes
SHA-256: f01ce8351a1e76d1b21937c8d80678bcb830053efee19aba22d4ab88b0541980
font_01_sfnt_off000067eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EB 10360 bytes
SHA-256: 06896b91be707125f2b132ecfeb361d21a258d201aa1606df9810c97bdf5f767

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