Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed4adfa3dca0042…

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 12:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bf26e562243a2be15500e536cfc15d5 SHA-1: 7b4536b065a1a3c85a5fc31ce839057b569e81eb SHA-256: 9ed4adfa3dca00422c4f8b570881a3b91f7cdfb04ba55a2d5d1968f94569aba3
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a song download lure and the malicious URL. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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.com/wix?keyword=har+pal+meri+yaad+tumhe+tadpayegi+song+download
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/vascular_malformation_treatment_in_infants.pdf
    • https://cdn.shopify.com/s/files/1/0449/8512/2984/files/gta_5_ps3_cheat_codes.pdf
    • https://cdn.shopify.com/s/files/1/0434/6521/2066/files/13082988294.pdf
    • https://cdn.shopify.com/s/files/1/0435/7586/9599/files/60885427622.pdf
    • https://cdn.shopify.com/s/files/1/0452/0479/9639/files/94423209336.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/personal_training_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4992/files/bluestacks_para_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/8505/2566/files/74525587989.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/61434741066.pdf
    • https://static.usrfiles.com/ugd/b8c837_a275e4d28f764478b9dd137a609f409c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9947050d62384407bd39a6aeef7e5bc2.pdf
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/act_practice_test_with_answers_and_explanations_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/3014/3395/files/angular_6_responsive_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/non_resident_capital_gains_tax_form_uk.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3450/files/26521689024.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004788.bin
2914fd4fa3a9378712b08b7f7a170113ebdfc36bc66a217e0ecd8f1b7428d0d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4788 5528 bytes
font_01_sfnt_off00005a3c.bin
accaceeb33bfc6e1bd405ccf38ad3f293e5702f423aa179c28c4c144154b86ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3C 1952 bytes
font_02_sfnt_off000063a1.bin
20385c2a0c389dbca3f91443463fcfab3cae3da9d9f9fab83b22f3f6d5b15a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63A1 9796 bytes
font_03_sfnt_off00008562.bin
9c71aaea62549e89be2b80026e8552e529abc9849e27d4ac1176ef2fe88b9bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8562 16380 bytes

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