Malicious PDF — malware analysis report

Static analysis result for SHA-256 60824ae2b9c13ea9…

MALICIOUS

PDF

46.2 KB Created: 2020-08-20 20:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05ca3f638402092e366ce0ad2c541273 SHA-1: 442548634a1980acbee367232fd1e23d09ceae52 SHA-256: 60824ae2b9c13ea92fac02d02280cfda13072e249f6185ffe6c2b37f0fb67124
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to generate traffic and potentially lead users to malicious sites. The primary URL, 'https://ttraff.com/pify?keyword=logo+quiz+answers+level+2+2018', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'logo quiz answers' and the malicious URL, suggesting a lure for users seeking information. The ML classifier strongly indicates 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/pify?keyword=logo+quiz+answers+level+2+2018
    • http://firadufe.building313.com/uploads/1/3/2/6/132681556/1546808.pdf
    • http://koriwudi.abellcable.com/uploads/1/3/2/8/132815806/4180883.pdf
    • http://taruparen.murielkneeshaw.net/uploads/1/3/0/7/130775126/90dd65b5503.pdf
    • http://files.soul-blossoming-therapies.com/uploads/1/3/0/7/130775741/dagogikudunusaw_fugeziw_fofavomaxilam_zopit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/jojukubenurufapinuna.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/ayushman_bharat_yojana_in_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8899/2674/files/wijebiboxexi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/automotive_technology_principles_diagnosis_and_service.pdf
    • https://cdn.shopify.com/s/files/1/0438/2729/8461/files/ridavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2807/9004/files/xuguferovobedelakasajina.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/xafegudep.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1707/files/gunoxuzebilile.pdf
    • https://cdn.shopify.com/s/files/1/0439/0364/7912/files/39738713677.pdf
    • https://cdn.shopify.com/s/files/1/0428/1915/8183/files/molaxawipowigevobikewim.pdf
    • https://cdn.shopify.com/s/files/1/0437/5108/0087/files/16148549530.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/stevens_model_311.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053c0.bin
8d70524dfd2e72a869621877074efe61b5848ab34f6820be7e34229df166e5ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C0 5640 bytes
font_01_sfnt_off0000672b.bin
9f9f5954749166da2d8a8fc807444a06b49f49673297d07badc7c5ead943c8af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672B 13232 bytes
font_02_sfnt_off00009104.bin
4de8d8ad80d7faef4649bae6b9058095f91d43eb631b5b4cb27320c5b2975c96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9104 17672 bytes

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