Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f02c04afc7f6c71…

MALICIOUS

PDF

43.1 KB Created: 2020-08-13 23:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e33de25aa1df2239c4f7f5a74daacc77 SHA-1: f4173b7f7360a414a7172f418bff2070dcb77460 SHA-256: 3f02c04afc7f6c71b66e0bc247420f7d00c1ed373d0272454e74ebfd642c9d23
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing for a link redirecting to known malicious infrastructure. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify-hosted PDFs. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.ru/pify?keyword=best+day+of+my+life+sheet+music', is likely the primary malicious entry point, potentially leading to further compromise.

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=best+day+of+my+life+sheet+music
    • http://lesezede.farobankcreative.com/uploads/1/3/0/8/130813528/kilok.pdf
    • http://files.bfaa4us.org/uploads/1/3/1/8/131871518/04290c43b7.pdf
    • http://nolal.gotodose.com/uploads/1/3/1/3/131383791/nojivavidevad.pdf
    • http://vomeve.thegreatmanginoadventure.com/uploads/1/3/1/6/131606111/ce1f555c7cf2529.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/pabiwilalinogasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0931/8813/files/dorusareluxeteke.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/29361558083.pdf
    • https://cdn.shopify.com/s/files/1/0430/4951/7205/files/cuda_ubuntu_16._04.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7653/files/an_introduction_to_cardiovascular_physiology_levick_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/hd_avi_movies_2015.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdf
    • https://cdn.shopify.com/s/files/1/0434/6904/5926/files/oxford_discover_writing_and_spelling_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/28105693440.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/geometric_sequence_real_life_problems_with_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8711/files/55009630557.pdf
    • https://cdn.shopify.com/s/files/1/0429/0805/7759/files/mail_address_for_form_944_without_payment.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/lunar_puzzle_neopets.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_off0000694e.bin
ad42eec2b30c1653eec5ef458a08b68b664f016f5ab0fa7981d23b6891c7be12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694E 5316 bytes
font_01_sfnt_off00007b4c.bin
e0025e85cfa212b73bf78b7ae6ba34fe8b7e640a3eefa59b4dceebd846c274fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4C 10468 bytes

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