Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8fb1544153f6da1…

MALICIOUS

PDF

38.1 KB Created: 2020-11-01 07:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 795b2a53fd3783281a213b6b2010ec63 SHA-1: 1c28701b64eb277f0f83e37f6f7810913bcb23f5 SHA-256: b8fb1544153f6da13ff83e69df5eb2b929d01252e6e705e24a65067899e2ff36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, with critical heuristics identifying it as a malicious redirector link and a PDF link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URLs identified are ggtraff.ru and a weebly.com subdomain, suggesting a campaign focused on redirecting users to potentially harmful content.

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/123?keyword=wild+garlic+plants+for+sale In PDF document text
    • https://kuvejepi.weebly.com/uploads/1/3/4/4/134452054/zubanukazagemu_xokegivenag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f9b0e79212d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5f92365398a50.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/nerazox-dozanomafub.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/7721246.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://cdn.shopify.com/s/files/1/0496/8411/9711/files/guide_michelin_2020_france_alsace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/498fe8e9-1020-485f-8635-5aca494b8283/zawirozaxifat.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/80212090836.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2798/6109/files/impact_test_of_aggregate_lab_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d2285c-f9f3-4ffe-a0fe-11cfa40d0df1/89443708871.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/nefazamosuzujobozebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c009362-4a64-46e4-9cbb-15f4b533fd25/dibitekuxewitor.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_off00004b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B23 5124 bytes
SHA-256: 5f2fb4577ffc4301a970e65bd73059764d192630ef2a3b6e28520ef8f2c4b32b
font_01_sfnt_off00005ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA6 9680 bytes
SHA-256: a8f4e29acab0a95ad04006e4d3f947b28046ea61ee79fc421618292a67114d8f
font_02_sfnt_off00007dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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