Malicious PDF — malware analysis report

Static analysis result for SHA-256 889e3476134a3a8e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-19 03:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afe96b6e213a335998556ec6d185e23b SHA-1: df5ddba87d3c75595f40ada54c2889e13b9c28eb SHA-256: 889e3476134a3a8eb0064c5ac557f942246d058509d4af074045c3077a4f1e8b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious content. The document also features a large number of embedded links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the ML classifier and redirector heuristics strongly indicate malicious intent, likely to lead the user to a phishing or malware download site.

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=food+safety+and+sanitation+worksheet
    • http://denonu.learningdifferencesresourcegroup.com/uploads/1/3/1/3/131381241/95ed46d168e02.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/3752/2082/files/himnos_cristianos_pentecostales.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/vomifexuzozabadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/paxovezabidodetugop.pdf
    • https://cdn.shopify.com/s/files/1/0450/0871/5940/files/basic_concepts_of_islamic_economic_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/54518724613.pdf
    • https://cdn.shopify.com/s/files/1/0452/0011/3813/files/fekaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/vevirusonabovubud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/95375100510.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/29157069822.pdf
    • https://cdn.shopify.com/s/files/1/0440/1351/9006/files/88864333285.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/73423539333.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/10425221018.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_off0000681a.bin
cd01a468daad1ad0a65ddbbedcfd68940ff081b1037e68d42aab786b51d60745		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681A 4964 bytes
font_01_sfnt_off0000790f.bin
4f0c6ad73fb97cd46ff046a0b3ba6d7d8be1d8850654687bdbd9f50c1aff26ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 10436 bytes
font_02_sfnt_off00009cb6.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB6 4324 bytes

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