Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c7359ef099b5542…

MALICIOUS

PDF

35.0 KB Created: 2020-10-06 11:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7f349d23a76609ad7445ce0bfc2115c4 SHA-1: 14c775ef53fd93101592946156dfad4bf6fc0f84 SHA-256: 1c7359ef099b55426f79272c829ffbc529f3931e8d2034f535702290da972aea
124 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically `https://ggtraff.ru/strik?keyword=homeopathic+medicine+guide+book+in+bengali`. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to a potentially malicious site. The presence of multiple links to disposable hosting and a known redirector indicates a phishing or malware distribution attempt.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=homeopathic+medicine+guide+book+in+bengali In PDF document text
    • http://puxamo.icanisciolti.com/uploads/1/3/0/7/130775493/6ffcee5b928a6fa.pdfIn PDF document text
    • http://files.drainagesolutionsdirect.co.uk/uploads/1/3/1/3/131384214/e82fa691cc.pdfIn PDF document text
    • http://files.arcadiafsc.org/uploads/1/3/0/7/130740592/zuxetajatevo-pukof-xutefodulo.pdfIn PDF document text
    • https://site-1042510.mozfiles.com/files/1042510/gesujadojejapun.pdfIn PDF document text
    • https://site-1039921.mozfiles.com/files/1039921/womusodanabazemunovareke.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/vosatukanobivofibofolow.pdfIn PDF document text
    • https://site-1038317.mozfiles.com/files/1038317/4284543135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/12353118584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6951/9510/files/doi_mat_khau_game_ngoc_rong_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/64807006962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8333/3799/files/vazowadowiresekas.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_off00004b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B80 5380 bytes
SHA-256: cece0c6878ed362a6b00ffe6b39f82df8429db5289b39afc4ea4909243c54793
font_01_sfnt_off00005d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9C 9720 bytes
SHA-256: ebe3ff666fc645da01250fd8f1d93e224da08a15695f71b74f6ff38c6a3f0822

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