Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04fc38d662bc7f6…

MALICIOUS

PDF

42.4 KB Created: 2020-10-23 23:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1a16ac7a2c76c3ebf5230e69d7ecfd01 SHA-1: 81541f31bfb1eaf1ce0a136f5fae7ba28d24cb7e SHA-256: f04fc38d662bc7f637a962b045e48a67b34955eba58c1fa6d387cf6c7678c207
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/aws?keyword=alumbramiento+patologico+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the first identified as 'https://cdn.shopify.com/s/files/1/0433/7057/8070/files/2584273038.pdf'. 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.com/aws?keyword=alumbramiento+patologico+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f8c7175e8e5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5f88849bad167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f8a8059bc302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f86fe7512fd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f8f75af89d31.pdfIn PDF document text
    • https://vabeliguteziji.weebly.com/uploads/1/3/1/3/131379360/lezogugadenisoxizip.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/138b048bfac575d.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/detox.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/falitaterajozesowus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f8a94dfb61ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5f8c8ed652707.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/1/0433/7057/8070/files/2584273038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1422/0699/files/western_civilization_spielvogel_8th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/potencia_corticoides_topicos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8585/9490/files/french_articles_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2629/8533/files/31041438900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/liwixomes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1671/2100/files/when_do_booth_and_bones_sleep_together.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7961/2578/files/36304001828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18bdb549-f39d-49ad-b056-36c3c1c441f1/rujabano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/696648b4-3bd7-458f-badb-4caf73866b1e/misevurat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/720f0159-6f5d-4f9e-b75e-1ea401ca4b34/83817877057.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_off00005730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5730 5308 bytes
SHA-256: df2d6cf8f68f5bac59672932a4d12969e1b915417e2ca99ffc9ebb0970e3295a
font_01_sfnt_off00006916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6916 10624 bytes
SHA-256: 7a8c5dbc090306c51172cbdb57915681cfde84a1ab210e5538cfa8bf61777edf
font_02_sfnt_off00008c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C97 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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