Malicious PDF — malware analysis report

Static analysis result for SHA-256 b025ec9796b53391…

MALICIOUS

PDF

42.7 KB Created: 2020-08-21 13:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bbee11c08db8251fb832d93f194eba1 SHA-1: 1a541e1fe6846c39193352c5ca72484315fa214a SHA-256: b025ec9796b53391cdbf551024b0101eb256988dba736e39aa70a61572f1fe69
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a malicious redirector URL (ttraff.cc). Another heuristic indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or distribution. The ML classifier strongly flagged this PDF as malicious. The presence of the URL 'https://ttraff.cc/pify?keyword=album+cut+songs+tamil+free' in the document body and as a heuristic firing is a primary indicator of malicious intent, likely leading to a phishing page or malware download.

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=album+cut+songs+tamil+free
    • http://files.sanmateolimos.com/uploads/1/3/1/3/131383553/612544a.pdf
    • http://files.cleanslatetattooak.com/uploads/1/3/2/3/132303175/mutuwowiresezabujuji.pdf
    • http://gepevi.themysticgrounds.com/uploads/1/3/0/9/130969481/virog.pdf
    • http://files.vulturepeaksilverbars.com/uploads/1/3/1/6/131606745/nagebefokafe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3360/files/bye_bye_birdie_jr_script.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/56257816564.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/rixebunibefezifedix.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/aleister_crowley_book_of_law.pdf
    • https://cdn.shopify.com/s/files/1/0429/1140/0102/files/junigegipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0894/1467/files/arabic_alphabet_dotted_tracing_practice.pdf
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/ignou_ba_2nd_year_admission_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1782/files/buvibugadomeraverizotujow.pdf
    • https://cdn.shopify.com/s/files/1/0438/0203/4336/files/vetibonumij.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_off00006799.bin
5d8087b5e4ffd41efe62c31a09474edd1f3fdccb2cb1638669c11a8ea8590d5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6799 5328 bytes
font_01_sfnt_off0000799e.bin
c7ed29c16832436fcdeca8026befe9772a06c174b825a36c78232405b55e57cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x799E 10684 bytes

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