Malicious PDF — malware analysis report

Static analysis result for SHA-256 3086e4a6a3508512…

MALICIOUS

PDF

56.9 KB Created: 2020-08-08 22:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1efc65a13d0517347b9c3cec3084aa05 SHA-1: 34719996f926138d610624b0315c55e03576fae7 SHA-256: 3086e4a6a35085124b0448aefb6e016175a4bccf9213cb33c3c87d0f5104cf38
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=medicina+placentaria+pdf
    • http://files.jodymorse.com/uploads/1/3/2/7/132740270/bitiram.pdf
    • http://files.nationalparkswithkids.com/uploads/1/3/0/7/130740522/f7a74a4a181c3f.pdf
    • http://files.five4him.com/uploads/1/3/2/7/132740435/8763100.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/arm_strengthening_exercises_for_seniors.pdf
    • https://cdn.shopify.com/s/files/1/0439/4736/0424/files/limibelinikemuxobekexudis.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/40790415565.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/wafebemumojodoxagavukovob.pdf
    • https://cdn.shopify.com/s/files/1/0432/2230/2888/files/40878829225.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/59923269999.pdf
    • https://cdn.shopify.com/s/files/1/0439/4231/4152/files/applications_of_artificial_intelligence_in_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/govonuzubujevutevunovakuf.pdf
    • https://cdn.shopify.com/s/files/1/0447/1370/5625/files/creative_company_profile_examples.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/fifty_shades_freed_free_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0437/1687/0293/files/cash_book_entry_in_tally.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000682c.bin
746cda19d0a45b0d6108c63ff8192b2f88c2fff5e5937e692a7cb04b31166607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682C 6588 bytes
font_01_sfnt_off000078a6.bin
14c399531de8262798cec44e3cf1ca583f47e2dac9a53350c5f7b70d9ce99cc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A6 4976 bytes
font_02_sfnt_off000089a8.bin
d0ec661a3c981b5b005af2c59de6552b6278c44cb23648fe7db05c3d55df1275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A8 5556 bytes
font_03_sfnt_off0000999d.bin
57c6d917c9cb394579541ed5dcd56d1351e921efef19f450b6864d1ab4a52563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x999D 10792 bytes
font_04_sfnt_off0000bea8.bin
04a2ed69f00d48a206d8f803de549f6227ddbf63057ce7daa56af68409d75a43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA8 16560 bytes

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