Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccdc10f6f298163a…

MALICIOUS

PDF

39.3 KB Created: 2020-08-13 00:40:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 881f5bf770ab8d5c47c17d5328135e45 SHA-1: 02bbe0207a42a372398cf9584433d07cb199a43a SHA-256: ccdc10f6f298163a73845c860c316343a996b71b6215766f6ece79f3482be5f8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary malicious link identified is https://ttraff.ru/pify?keyword=common+core+math+workbook+grade+4+pdf, which is presented as a download for educational material but likely leads to malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=common+core+math+workbook+grade+4+pdf
    • http://kaletiniw.rightwordswork.com/uploads/1/3/2/8/132814930/6577039e6a.pdf
    • http://files.dltyoga.com/uploads/1/3/0/7/130775393/jukaraz.pdf
    • http://ninifos.ucfsrilanka.org/uploads/1/3/1/6/131637814/7089605.pdf
    • http://files.mobile-mower-fix.co.uk/uploads/1/3/2/6/132682627/95e5e2e9eaa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/suwagizapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55166802931.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8194/files/dumadubirobibamem.pdf
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/monster_encyclopedia.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0663/files/60905179850.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4965/files/antgona_dominio_publico.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7508/files/fifelomizur.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/11799493554.pdf
    • https://cdn.shopify.com/s/files/1/0428/9639/2348/files/rubevolazododugaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0412/files/acretismo_placentario_ultrasonido.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/timulufokinutajoso.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_off00005a26.bin
280eced9aea4d18ccd21ecb6a6b9657a665ac3f7319207259866d71f23fd31e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A26 5648 bytes
font_01_sfnt_off00006d49.bin
b486ee276502211c75a0f8a0f9caa6adad5b360c646020355640f9458470cc00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D49 10288 bytes

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