Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada773f801eeb462…

MALICIOUS

PDF

41.5 KB Created: 2020-10-26 06:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 305082c139f6ce48f3b950bfff4d61cd SHA-1: 2cbc7176e4373393fa9b6cbf3bf636b8a04d3f40 SHA-256: ada773f801eeb4629c3a0cca487c14d2f383a705408904fc61825c3024f3d934
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains URLs pointing to disposable hosting, suggesting a link farm or phishing lure. The ML classifier strongly indicated maliciousness, and the heuristics confirm the presence of malicious redirector links and a link farm on disposable hosting.

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 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.me/123?keyword=puma+shoe+size+guide+uk In PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/mojesalivir-poxugamajid-bapovitifeseb.pdfIn PDF document text
    • https://merebidoso.weebly.com/uploads/1/3/4/3/134344951/pexafemejufoku-dakepepo-zukozax-rowawen.pdfIn PDF document text
    • https://sexutenevasasi.weebly.com/uploads/1/3/4/3/134306733/2821101.pdfIn PDF document text
    • https://jasasenud.weebly.com/uploads/1/3/4/1/134131975/bepazufogum.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/95dc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_5f9528914ace3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f88899aa4048.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/9092635.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/1435e151.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/5c149ebae4a.pdfIn PDF document text
    • https://jederatikepu.weebly.com/uploads/1/3/4/3/134370591/sawikanuparab.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/62676f8b-921d-4949-ae64-afe207b3c4ba/nomarubidukolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8cb9b0-2d83-4ff9-a1f8-fdb754751421/coupon_sinh_nht_ca_coopmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/167ade79-c9d3-4d1d-889a-0c3cd5dc8918/jifavipemebusimaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed63fda4-52b8-4eeb-9814-99bfafd0adfb/lumigimumeweno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5bb26c-fb8a-4e1c-8898-d87203e5a911/xovetabati.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000645f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645F 5228 bytes
SHA-256: c3fa4bef212bbda4aabbb97212f6b749244c633b66ff95ed223459d6a63e7e8a
font_01_sfnt_off0000760f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760F 10456 bytes
SHA-256: d395f70399473a98a155b28e194e41ef426e93d03d18b67a70a69cf1af2e7cc7

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