Malicious PDF — malware analysis report

Static analysis result for SHA-256 801b4496658d37d3…

MALICIOUS

PDF

42.7 KB Created: 2020-08-28 02:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d23cb1a084bba3dacedf7c66927c37ec SHA-1: bbaf7ee9dec651cce37dd199e2188d17f24ebd82 SHA-256: 801b4496658d37d3b6009f56b9335c7c9316863140f1fd1d8d786aa6d5bcb16e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic. One prominent link, https://ttraff.com/pify?keyword=buku+akuntansi+biaya+mulyadi, is identified as a malicious redirector. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the PDF structure and embedded links strongly suggest a 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.com/pify?keyword=buku+akuntansi+biaya+mulyadi
    • http://dojos.atlanteanheart.com/uploads/1/3/0/7/130776483/7209153.pdf
    • http://files.kothariinfotech.com/uploads/1/3/0/8/130815093/talerem-gotuzovi-tedawafawadil-sexurefumamudug.pdf
    • http://files.elizabeth-noble.com/uploads/1/3/0/8/130874197/03448.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2596/4966/files/83351798898.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/cadena_trofica_ecologia.pdf
    • https://cdn.shopify.com/s/files/1/0435/2363/7402/files/template_powerpoint_free_science.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/xununipafuzexokasuza.pdf
    • https://cdn.shopify.com/s/files/1/0447/0757/8009/files/mastering_physics_download.pdf
    • https://cdn.shopify.com/s/files/1/0447/9831/2609/files/15055610654.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/rugowopaborakuripo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3197/0460/files/gulosapetada.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/breviario_del_caos_albert_caraco.pdf
    • https://cdn.shopify.com/s/files/1/0431/2809/4882/files/vuloxuxebupidutasadipuku.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/95224884831.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/dasizulifegorujafej.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000696c.bin
4cd3df7b679d3ba08fc0accb9e2fdf8497bda7ddc768d864480a7ba236a01d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696C 5232 bytes
font_01_sfnt_off00007b2d.bin
c59d6fc8c94a8c95d22573564fcb17071f8fecafac5a1f03ca0ee522307d9ef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2D 10080 bytes

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