Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5e2aed73c19180…

MALICIOUS

PDF

63.3 KB Created: 2020-11-03 20:48:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 1eb175ef48bdbc4a8bfde4a05773a225 SHA-1: 40cc746128ea5a95618a286d53e49e272ca80fdd SHA-256: 6f5e2aed73c191802656ff9117db50d220fa338f77693651ef98d6071129c71f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, possibly for SEO manipulation or further payload delivery.

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://gettraff.ru/aws?keyword=golden+triangle+wikipedia In PDF document text
    • https://mikakegurotitu.weebly.com/uploads/1/3/4/3/134309030/laxewomevaduzik.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/nixezuwime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_5f95a87412ef4.pdfIn PDF document text
    • https://bizevino.weebly.com/uploads/1/3/4/3/134320064/wazurubaruvesipexuxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f896987270d6.pdfIn PDF document text
    • https://vokozigaga.weebly.com/uploads/1/3/4/3/134316184/nakeletipiwawebegup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4780/7907/files/ridefes.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/scholastic_dictionary_of_synonyms_antonyms_and_homonyms.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/wooldridge_econometric_analysis_of_cross_section_and_panel_data.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/jefawuwiwegifim.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/galesukaju.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/wepoji.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A14 3428 bytes
SHA-256: f97e64f015fc7b4f085f1ae13e18233311280efeb3d4b7e5cdfa960e7f62d359
font_01_sfnt_off0000864f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864F 5136 bytes
SHA-256: 094bf5760288dd4f7ee5a39c358734917c697f31645017d6cf95389efbd50723
font_02_sfnt_off000097e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97E4 7140 bytes
SHA-256: 3772e67be1c73b70cdff87371bb3a707b8f7d3fdeede92f416c3f4a76eec6777
font_03_sfnt_off0000ab2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2D 12812 bytes
SHA-256: 304d33f688cc27ed55dbd88560ae0cdf57fdf3b7af5120c335eb6f0e45cf2a18
font_04_sfnt_off0000d483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD483 17644 bytes
SHA-256: f3a2a170211ed38af93fd4ca55553138c6916a496f1f183ddfc7447e7ad5ac6c

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