Malicious PDF — malware analysis report

Static analysis result for SHA-256 42d960186240d2de…

MALICIOUS

PDF

43.6 KB Created: 2020-08-09 06:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8be8a908cc4bbfdebd9f70571ad9604 SHA-1: 96af51c44188b99428ff96d2a4f6cf9cc834b2ba SHA-256: 42d960186240d2de7cc053b63d9b6dce6c2557657710d0987e12c30dcff3da08
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious due to a high number of embedded links, many of which point to external PDF files. One URL, https://ttraff.ru/pify?keyword=biomath+paces+pdf, is identified as a known malicious redirector. The document body contains garbled text but includes the same redirector URL, suggesting a potential lure or redirection mechanism. The presence of numerous external links, including the malicious redirector, indicates a likely attempt to drive traffic to malicious infrastructure or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=biomath+paces+pdf
    • http://files.catherine-banner.com/uploads/1/3/1/4/131483009/suwuvugulogiwutiluxa.pdf
    • http://files.parlinfarmcabins.com/uploads/1/3/1/6/131636683/d5da1e.pdf
    • http://files.lengleart.com/uploads/1/3/2/7/132740260/fajerobu.pdf
    • http://files.hallandhines.com/uploads/1/3/0/9/130969935/donunukodivan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/26630857316.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/census_report_2020_nepal.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/adjectives_worksheets_for_first_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/38186108869.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8181/files/past_tense_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0450/5144/5400/files/avantages_allaitement_maternel.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/github_upload_folder.pdf
    • https://cdn.shopify.com/s/files/1/0428/7895/9775/files/tizopa.pdf
    • https://cdn.shopify.com/s/files/1/0436/5054/7870/files/mutomududuvategina.pdf
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/xederokisiriwame.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b92.bin
7ce36dc728eaae96de499449f8824ccc27409eadb23703071ff3677d765cac0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B92 5316 bytes
font_01_sfnt_off00007d80.bin
72019fa784e90a2349f1a6789765728459df0aeddd9d2a911f3293d75ade1712		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D80 10696 bytes

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