Malicious PDF — malware analysis report

Static analysis result for SHA-256 497f596a89d6b649…

MALICIOUS

PDF

71.3 KB Created: 2020-08-13 21:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98d7a8b7743c24587c0407b3605de1fa SHA-1: 269164e4addca8a3dd78b25b4545003b8eac2cd6 SHA-256: 497f596a89d6b64980c410515d5e0ee83c794f6ed77f7af5894a9207a2f1d25e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=malayalam+box+office+report'. The document body, though heavily obfuscated, contains this same URL, indicating a lure to redirect users to malicious content. 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.ru/pify?keyword=malayalam+box+office+report
    • http://files.janleree.com/uploads/1/3/2/6/132682076/6133500.pdf
    • http://files.minhtamcharity.org/uploads/1/3/1/3/131381607/fovudikilerikomo.pdf
    • http://files.eskrimacombativesfmaie.com/uploads/1/3/2/8/132815015/xomov.pdf
    • http://files.threetimesluckyband.com/uploads/1/3/1/1/131164118/d0937bc111253.pdf
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/kozina.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/wojug.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/daleragejejifapak.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/xuxugiluziwuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4736/files/fiche_technique_de_pisciculture.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/wemizejalogikixino.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/thai_airways_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/9285/9293/files/porezasasaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6695/files/parent_functions_and_transformations.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0770/files/american_english_file_2_second_edition_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0445/6821/5716/files/java_ee_spring_spring_mvc_mybatis.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_off0000d9ec.bin
15f9b43c976a3cf249b324e30e39d2dadc08be93411b77674aac147b22a217fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EC 5300 bytes
font_01_sfnt_off0000ebf4.bin
6bfce34670afa9d92d4e2a7407f4cbbe2a402e3a6cf1fdac8e4b22647bb4803d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF4 10656 bytes

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