Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ced4d4880df706…

MALICIOUS

PDF

49.2 KB Created: 2020-10-26 22:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bdf898263bc43187cbef59a68060cfac SHA-1: 9d74b223ad026c399d1c799267d8777453c3a7fc SHA-256: 78ced4d4880df70664ef1e59d04db55822436e9cf95afc1e8d5c6f5e6baca76b
154 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, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/123?keyword=star+trek+tng+technical+manual+pdf, which is flagged as a known malicious redirector. 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://ttraff.ru/123?keyword=star+trek+tng+technical+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f8aa9bd3a625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f8cb30f86d1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_5f8b3d6529d82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5f8b689583315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f9435d118521.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/tezabuliwuzet.pdfIn PDF document text
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/fuwujoketajuviv.pdfIn PDF document text
    • https://meboguvogo.weebly.com/uploads/1/3/1/4/131437667/a8fa3155.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://uploads.strikinglycdn.com/files/d8f1f55d-1528-4777-805f-a5d2f3aeea8c/rimurawozemefef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3eaae06-881b-4896-91bd-8557527c8387/66011015561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d3f8ab-75c1-4eb6-a7c0-dd40eed90ea9/80615030329.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/affairscloud_current_affairs_july_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/tedinutug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d46f8d0-0fef-491d-8a16-c050461bb864/sims_4_baby_decor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff05ae3-fb7d-4c78-a33b-23a27616f5d3/tixijagolefatu.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_off00007181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7181 5328 bytes
SHA-256: 31779739cfd1f3e42c260884fc684ac8f9b03ebc60c9fbf27847fa9981698b77
font_01_sfnt_off0000836c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836C 11180 bytes
SHA-256: fb03c477e15810c9ce2799ac65c3b6a9663107ea2c309a1f928b8bb3e2c373da
font_02_sfnt_off0000a928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA928 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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