Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb681a2bdc4580d…

MALICIOUS

PDF

46.7 KB Created: 2020-11-09 15:05:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 39bf4d3593873fb820490b131a912d82 SHA-1: 54eed5bb8ba0b32c1a759fe52bc018e735b097d7 SHA-256: aeb681a2bdc4580d91fb320852fdda3a3312456ed56d32b3b0f8af62f2f8a16f
154 Risk Score

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 'traffine.ru'. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The primary malicious URL identified is 'https://traffine.ru/aws?keyword=hiking+merit+badge+worksheet+2015'.

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://traffine.ru/aws?keyword=hiking+merit+badge+worksheet+2015 In PDF document text
    • https://tukibasitotaz.weebly.com/uploads/1/3/4/4/134445351/5038263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5f8b6be965c42.pdfIn PDF document text
    • https://tuzuwopibas.weebly.com/uploads/1/3/4/3/134316447/biripeneraz_difokatu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368949/normal_5f91e624036b6.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://uploads.strikinglycdn.com/files/5f170654-e57d-4056-8a79-44936460ecb9/dadasefurujofifujor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c32b6855-89ac-4084-b3db-45c407577d3f/xojewelokufironivunuk.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/2005_nissan_sentra_body_repair_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82cd266a-e802-4635-90be-10b79f188cf5/bosokizukiwulejoj.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/rimland_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8e9daa-d6f4-44f3-b1fa-6ae686865c5d/19730744353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d18cce6-72be-4040-8f0d-53ff33468eee/xareguviwapuritejiniboke.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/notary_public_exam_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/damevusom/aisha_winx_boyfriend.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/kadezejunopipowe.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_off000066c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C2 5704 bytes
SHA-256: 1557e749bc063ef2ecfedbc9d41d2d0ad903a15f940ed6234425c30b98692455
font_01_sfnt_off00007a06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A06 11032 bytes
SHA-256: 9f2d5c78721b6643ea0bfb3064e30b310a217769dd6d60913073c2e8db1c8ca8
font_02_sfnt_off00009f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F81 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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