Malicious PDF — malware analysis report

Static analysis result for SHA-256 3518fce4c71d7ca7…

MALICIOUS

PDF

87.9 KB Created: 2020-10-31 10:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 88734cb6ac028a243e4b0037e5d3755d SHA-1: 38d43242e4a07758457bbd39f7fc83d282700849 SHA-256: 3518fce4c71d7ca71b48e6ee4a62fd6c6852d5f7db1e19bec7ebf52e6de8404e
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. Additionally, it exhibits characteristics of an MFA lure, suggesting an attempt to harvest credentials or session tokens. The presence of numerous embedded links, many pointing to benign-looking PDFs, indicates a link farm strategy to obscure the malicious destination. While no scripts were directly extracted, the PDF structure and the malicious redirector strongly suggest an attempt to deliver a second-stage payload or phish credentials.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/pify?keyword=power+probe+ect2000+walmart In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5f9ca97317a5d.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/ginutu/unt_bus_schedule_discovery_park.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/ataxia_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7413/4438/files/48874361792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4373/4182/files/zinorimekizamofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7723/1278/files/34840911377.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/behavioral_game_theory_experiments_in_strategic_interaction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/list_of_foods_high_in_protein.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69737774-07f6-4e61-9156-233d3d46c938/61332690929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5955/9065/files/snap_peas_calorie_count.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7088/0414/files/xerazeritogasosuxarolige.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_off00011df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF5 5408 bytes
SHA-256: 383c65f3490fa83350d9fcdff934ae5b8bfee6753758b4ca3a596c612c287c62
font_01_sfnt_off00013059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13059 10112 bytes
SHA-256: 1783b571482514ff097f560bcd3a3f8bb60ee0502b06a9682911ddc81faffb08

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