Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce69af9636a8503…

MALICIOUS

PDF

37.0 KB Created: 2020-08-14 07:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2a498683a23f235e5a4c1e520c9f55c SHA-1: 214c1e1b108c841842d16a3d97968fe4a499b84a SHA-256: 5ce69af9636a8503ff0443aca1d9bcf14d2d657a37f111d28ad390618de183f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document also hosts a large number of external PDF links, many pointing to Shopify-hosted files, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=animal+non+chronological+report+year+4
    • http://files.evelandfarm.com/uploads/1/3/1/4/131436971/93088aafe1eb3.pdf
    • http://files.allislandmartialarts.com/uploads/1/3/1/3/131398224/cdd72a2.pdf
    • http://leman.chanabarriger.com/uploads/1/3/0/7/130776049/wobejufe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/pipakemaguse.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/keporemitapevulabiwage.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/vodolanimoxodiweguxagedak.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/anthropology_books_for_upsc_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/68839353506.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5188/files/35500514430.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/24306114092.pdf
    • https://cdn.shopify.com/s/files/1/0429/4216/9244/files/perorudagomigawukiwadizep.pdf
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/alkylation_of_enamines.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/vekaburadebiniraxo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/86327852945.pdf
    • https://cdn.shopify.com/s/files/1/0429/2483/4975/files/83919710277.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_off00004720.bin
1616a91eb6a17d472dddb6dd0a0794580fa150f47c1cee5590385c5dbd2eafcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4720 5136 bytes
font_01_sfnt_off00005865.bin
8c89f7a59a4fc3682ab324774e56e46a385fe2d462c71adbafecf6e0add50eda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5865 9556 bytes
font_02_sfnt_off00007912.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7912 4324 bytes

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