Malicious PDF — malware analysis report

Static analysis result for SHA-256 6797b4309b417282…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 21:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98a89cbc6b55c2131a7027d0f5ddfea0 SHA-1: d5bfbd08a10fb122ae2bf972539f918d92287afb SHA-256: 6797b4309b4172829519ddd31c9181df9158d1fddcfb2d48eeb2c65c2cd67a33
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the URL that triggers the redirector, reinforcing the malicious intent.

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=adjectives+worksheets+for+class+5+pdf
    • http://jidazo.bellcitymotorworks.ca/uploads/1/3/1/3/131384429/nugejikosub.pdf
    • http://files.montanalanguageteachers.org/uploads/1/3/1/3/131379217/81740e7af12a7b5.pdf
    • http://files.everestcharter.org/uploads/1/3/1/1/131163832/lidugorabinojelonal.pdf
    • http://files.farmtomarkethemp.com/uploads/1/3/0/7/130775398/vorukugosivupogo.pdf
    • http://files.aspinehealth.org/uploads/1/3/1/4/131437295/84c87.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/cambridge_academic_english_b2.pdf
    • https://cdn.shopify.com/s/files/1/0432/6549/1107/files/19844847735.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/biludetejuvujatolometa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/imran_khan_youth_loan_scheme_2020_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/baxorozevemozazawamadenop.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/joxoxenekepiboxixizes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/wugiki.pdf
    • https://cdn.shopify.com/s/files/1/0441/2869/8520/files/pentatonix_daft_punk_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/crc_encyclopedia_of_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9860/3669/files/cenarion_circle_rep_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/rubupobikanetopikuvababav.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/best_npm_packages.pdf
    • https://cdn.shopify.com/s/files/1/0436/9815/9769/files/widazojekifilomezovipexo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f4.bin
1c52e2fef8d6346bb2b3d8898926d7764ee170cac9d6db01ce6d944426e7c647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 5328 bytes
font_01_sfnt_off00007642.bin
2ed3878aa47fc96a297fbe08285c040bf387ba722d63b29b2fe80673c3b2ce4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7642 9980 bytes
font_02_sfnt_off00009879.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9879 4324 bytes

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