Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da739426213bcf4…

MALICIOUS

PDF

40.7 KB Created: 2020-08-22 14:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a198c8699824dea01b1971ea465131c SHA-1: 8a1968766a9ab823d0d778d1b371a6a5976c898c SHA-256: 4da739426213bcf40870d2842c0736e91396c81ba02a0ea76aaede1aa9fec2f2
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to a 'Vietnam consumer finance market report'. The PDF also contains a link farm heuristic, suggesting it's part of a larger SEO poisoning effort. The primary attack vector is likely social engineering via a malicious link embedded within the PDF.

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=vietnam+consumer+finance+market+report+2018
    • http://files.italianstore.com/uploads/1/3/1/8/131857758/juwalumabo.pdf
    • http://files.biographyofanobody.ca/uploads/1/3/1/6/131637658/1253665.pdf
    • http://rasaz.cheerequity.org/uploads/1/3/1/3/131384401/siron.pdf
    • http://files.ucra.us/uploads/1/3/2/6/132681479/5986284.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxajuvorupi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/68125330769.pdf
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/1959743551.pdf
    • https://cdn.shopify.com/s/files/1/0432/1217/7572/files/woh_pehli_baar_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/laryngoscope_journal_author_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/rudodopufezizon.pdf
    • https://cdn.shopify.com/s/files/1/0435/4025/0775/files/platform_bed_mattress_full_size.pdf
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/manufugame.pdf
    • https://cdn.shopify.com/s/files/1/0439/2045/7883/files/18635294612.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/padipinog.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_off00006020.bin
3acfc48693eb6c6b0f4f5d35eeb72a37fbd89fd40e678abc216f318dfbe00fd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 5680 bytes
font_01_sfnt_off0000736b.bin
6597b5b12d0ea912b1edfe961498577cf61f5918a34acf7d186196098f4f8ae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736B 10132 bytes

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