Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82f2ae3f166b5f3…

MALICIOUS

PDF

52.2 KB Created: 2020-10-29 01:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f0b26ed640f59f66741f081f4b5fc4e9 SHA-1: d7b0eb69893ab81649c786ef4a2d7a09e92a965c SHA-256: f82f2ae3f166b5f3a0445c16630c9f264ea65bd9245c18c5005828eaf9b2fc8b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. It also exhibits characteristics of a PDF link farm, embedding a large number of external links, with one notable example being 's3.amazonaws.com/bitizopovopaso/dragon_quest_4_chapter_5_walkthrough.pdf'. The document body, though heavily obfuscated, contains these URLs, suggesting an attempt to direct users to malicious sites.

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://ggtraff.ru/strik?keyword=john+doe+roblox+story In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5f9266781c401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f9980e0d7f6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_5f948975034e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5f8cc6f6b13a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406455/normal_5f926d6d1056f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/dragon_quest_4_chapter_5_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/teori_behaviorisme_dalam_pembelajaran.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4359/3109/files/32593077012.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3432/4387/files/54591630673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3809/5525/files/linitajufugogipo.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/blockchain_blueprint_for_a_new_economy_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2296/7206/files/celtic_heroes_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/85594399088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/5640/6940/files/harrahs_cherokee_event_seating_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/bsc_biotechnology_syllabus_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4157/8399/files/tujutuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8176/3483/files/banizego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51b0aa7-343c-44cb-907b-a5b09b22be68/17666369739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/6861/1480/files/jabra_cruiser_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e276987f-9802-4495-bf54-a1a06c0152a1/43161985476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0784/7831/files/zanadivubipuxoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4776006d-ed1f-4e4d-b3e4-4142d2ee29f2/7649666942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5834/3317/files/imaginarium_train_set_instructions.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_off00008b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4D 5004 bytes
SHA-256: fdd17b996404091110faf06a2f66ee3123c9db69ef97b8ed56a3d12d40128004
font_01_sfnt_off00009c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C4C 11588 bytes
SHA-256: eeef83c4a24f8c3200a83e6f0d0fb3e694391fbb4159b20d59cad62f546be9a6

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