Malicious PDF — malware analysis report

Static analysis result for SHA-256 144a8f1d3257a9b9…

MALICIOUS

PDF

97.1 KB Created: 2020-08-27 19:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b5b57164ef414038a2d7020fc9079234 SHA-1: fa6795a44c6d107bacb3eceb2072f5da16b88c75 SHA-256: 144a8f1d3257a9b9acd7bb4d8e8138a5eb04f892b9e33d07557a0eae333366a1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a fake CAPTCHA lure, designed to trick users into clicking embedded links. One of these links, https://ttraff.club/pify?keyword=gunnm+scan+volume+8, is identified as a malicious redirector. The document also hosts a large number of other PDF links, many of which are benign Shopify-hosted files, suggesting a link farm or SEO poisoning attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.club/pify?keyword=gunnm+scan+volume+8 In PDF document text
    • http://feloxe.baltimorekings.com/uploads/1/3/2/6/132680813/fenudas.pdfIn PDF document text
    • http://files.holisticwisdomandwellness.com/uploads/1/3/2/6/132682093/63c7301eed7f.pdfIn PDF document text
    • http://files.albertsenservices.com/uploads/1/3/1/0/131069789/bexewisenotepi.pdfIn PDF document text
    • http://tojet.wallstreetmodel.com/uploads/1/3/1/4/131437246/5778874.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/1/0434/7235/5478/files/haloalkanes_haloarenes_ncert.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3655/6962/files/dibenujazufaxanunuporuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/libekuberojatipinelara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/easily_nauseated_or_disgusted_crossword_answer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3633/4485/files/ruruxarufuragofaxoxet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/popuxixabis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/ruguvawimilegimebelaxitek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6389/2375/files/basiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/heap_income_guidelines_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/jugalebokusadurutu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65069223210.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1A 25004 bytes
SHA-256: d33e6cd20edbef4d567e40a0a4841d7b708a5a107d5f682ace8455ffe3ac9511
font_01_sfnt_off000128a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A3 4888 bytes
SHA-256: c24bae15b7036cb80e92aaec67406e1e5fa6a2fd5d3ef8214a235d82b064285c
font_02_sfnt_off00013924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13924 14668 bytes
SHA-256: 2343a8d7b5a3b255d8484b7892428827e726d8300f2adadc14ade4db873bd640
font_03_sfnt_off00016762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16762 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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