Malicious PDF — malware analysis report

Static analysis result for SHA-256 7472050127ba125d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-20 03:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a27856eaf59c1486902303348abf617 SHA-1: 63d43f95ff4fbb472e2c81770b0711c0cef95204 SHA-256: 7472050127ba125d10f6bea3817a7ddf89b2a82b0c8770c45aaa04a034de9d27
154 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'jaundice test report' and embeds numerous links, including a critical redirector to 'ttraff.ru'. This suggests a phishing or scam attempt to direct users to malicious infrastructure. The ML classifier strongly indicates malicious intent, and the presence of embedded URLs points towards a technique of luring users to external sites.

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.ru/pify?keyword=jaundice+test+report+normal+value
    • http://lavonesib.lindsayelisebrennan.com/uploads/1/3/0/7/130739756/wanozimagasiv_rirulaf_dikinasuwoti.pdf
    • http://files.equipoiseenterprises.com/uploads/1/3/1/8/131857304/lunukusizu-zipudad-kelor.pdf
    • http://wakixewa.montaukmist.com/uploads/1/3/0/7/130775173/ef9977384.pdf
    • http://files.riverbendins.com/uploads/1/3/1/8/131856071/nenixebamiv-voxijelazulupo-xikalibugezim-rakuletoligixiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/13984157584.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/antihistaminic_agents.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/didiselugazumera.pdf
    • https://cdn.shopify.com/s/files/1/0432/9259/0236/files/investigacion_descriptiva_ejemplos.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/kerewanasedizazetek.pdf
    • https://cdn.shopify.com/s/files/1/0432/8446/3784/files/38567845915.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bamizubonofosexewa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/house_rent_agreement_format_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6896/files/kpi_tree_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/malosokeniwevapinita.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/risidofu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/85514599265.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5447/files/75642538580.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_off0000651f.bin
eaf6a533164e95d7a16fa46f6e1fa091406d35c13cfcb0b5e3969a3c2c36b74e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651F 5268 bytes
font_01_sfnt_off000076eb.bin
481f58fea37e897a81e89894c6b461f49220ab0ce5a7e6eb20f4febb2ad7a266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EB 10040 bytes

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