Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c7a33c99f34329…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 16:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4a4a448102c2b2375296c014b9e9c99 SHA-1: 2820472df720dfd573dce75ebc5bb6c7e86ed68e SHA-256: c5c7a33c99f3432916308598dc25e6996cef3e651a2954b418bf43052e44dc48
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=ace+questionnaire+scoring+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of a large number of external PDF links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious PDF. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=ace+questionnaire+scoring+pdf
    • http://files.tridentpest.com/uploads/1/3/1/0/131070113/tageworonis_gupuradurem_xifar_zakamiduxukubib.pdf
    • http://files.trojerestaurant.com/uploads/1/3/1/8/131857115/mokapememunu-zelenarixiva.pdf
    • http://kemutune.nourishedandfertile.com/uploads/1/3/1/3/131380429/9773921.pdf
    • http://files.whitneypublicstrategies.com/uploads/1/3/0/7/130776366/7977035.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/17797895039.pdf
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/45050099657.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tusag.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/12205639360.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/98524011968.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdf
    • https://cdn.shopify.com/s/files/1/0440/0267/2798/files/platinum_physical_science_grade_11_learners_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/9955901371.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3140/files/etica_aristoteles_livro.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/aggregation_vs_composition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5376/files/casio_edifice_efa_121d_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/rokefavu.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_off00006a25.bin
1ca8ca1d4e80432609e19d4b2361776975712b25726d4836bfc704607dce94f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A25 5404 bytes
font_01_sfnt_off00007c93.bin
322757d64ca7b44b08e3017f643d5078dd973b11a5b88efe75a5dd5003ba525e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C93 10104 bytes