Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e1d177c28be1fe5…

MALICIOUS

PDF

42.4 KB Created: 2020-08-11 23:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c35ccdf7ce17112a6b46e7e214c73b2 SHA-1: aa2358461a7a5d47490ba2fc4504679f6f0f367d SHA-256: 8e1d177c28be1fe5301d92ebea04dc4d7d62495e5575873e6cebe2b1ea26df5d
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to SEO-optimized PDF files hosted on Shopify and other domains. One of these links, 'https://ttraff.cc/pify?keyword=best+pdf+to+word+converter+software+download', is identified as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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.cc/pify?keyword=best+pdf+to+word+converter+software+download
    • http://lonex.corneliahoogland.com/uploads/1/3/2/8/132814930/jajafo-kejama.pdf
    • http://kuxasol.olympiaindivisible.com/uploads/1/3/1/8/131857981/1157a1765f461e.pdf
    • http://files.advancedaccounting.services/uploads/1/3/1/4/131407406/a6ed8cc919.pdf
    • http://files.lehighvalleyoutdoorsbynickhromiak.com/uploads/1/3/1/4/131453944/6666782.pdf
    • http://files.vancareproject.ca/uploads/1/3/1/4/131437307/7701908.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/88195920127.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/53112310649.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/3392795369.pdf
    • https://cdn.shopify.com/s/files/1/0447/0842/9977/files/statistical_methods_and_data_analysis_by_faqir_muhammad.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/as_valkrias_livro.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/xaleri.pdf
    • https://cdn.shopify.com/s/files/1/0438/6547/3184/files/builtwithscience_workout_b.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/alcohol_y_gastritis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9918/5561/files/25982623541.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/6228512686.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/nacionalidades_en_ingles.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_off000068aa.bin
1167668186cf0101a4afa5234f07d766b8d255afe918783cb03ce233ad6c5e91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AA 5352 bytes
font_01_sfnt_off00007b09.bin
e8de470b9095cccc9a21153a0935ad7e718e5aad447366065a5fffd0dad36f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B09 9828 bytes

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