Malicious PDF — malware analysis report

Static analysis result for SHA-256 b017557df41fe172…

MALICIOUS

PDF

63.6 KB Created: 2020-08-19 02:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9887a73c03cadde2f5baddea7bc0dc81 SHA-1: 2fcde92b71d6055c15c8b63f6a77d24de15809cd SHA-256: b017557df41fe1721a86cb72febde298f9e037dac88cc3ce8925c1fe0c193d95
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 'https://ttraff.cc/pify?keyword=english+word+meaning+in+marathi+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The presence of numerous other PDF links, as flagged by the 'PDF_SEO_LINK_FARM' heuristic, suggests a tactic to distribute malicious content or manipulate search results. The ML classifier also strongly flagged this PDF as malicious.

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=english+word+meaning+in+marathi+pdf
    • http://wazeteg.drumshotel.com.au/uploads/1/3/0/8/130874218/xakikurunorijivaw.pdf
    • http://files.life9rescue.org/uploads/1/3/0/7/130739537/7a370fc3c6d.pdf
    • http://files.innovationsbuildingservices.com/uploads/1/3/1/4/131438741/3ca2f8128cf.pdf
    • http://files.iowaschoolsafety.org/uploads/1/3/1/4/131437924/ritejerol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2250/files/83383988825.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/24116462055.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/merebexepanivubatu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/27347874725.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/kelapegomovezoledazo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/wild_magic_surge_table_5e.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/26758831897.pdf
    • https://cdn.shopify.com/s/files/1/0435/7337/9231/files/taxinanupamebevuxirigome.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000093b7.bin
bdf5dd492b5e964cfdc78d632afe36854d0d82190f446c7c858c2a03593d5d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B7 5504 bytes
font_01_sfnt_off0000a655.bin
589601f60d3b37b0f5a61ff9edc6aa0af6af7852449424c71b6fd2af61578a0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA655 13448 bytes
font_02_sfnt_off0000d0e2.bin
c97bc3f6f1c4277c24c20e73829abf6b3451e346e73044723faa617bfeccaf0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E2 10024 bytes

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