Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7381d1db773a2e…

MALICIOUS

PDF

33.3 KB Created: 2020-08-27 19:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d0b1457b0a86b7a21954cbac5226969 SHA-1: de6f5b989410b61f60f375045d5a6f1f2178c8ef SHA-256: dc7381d1db773a2e7475eab4d23c65092b4b8e59a2457e63a9f1d38a04eb9a45
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to what appears to be a link farm designed to host downloadable files. One of these links, 'https://ttraff.me/pify?keyword=let+it+whip.mp3', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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.me/pify?keyword=let+it+whip.mp3
    • http://bufazi.finnmerican.com/uploads/1/3/1/1/131163729/feniruxezodewozuboke.pdf
    • http://files.candleliteinnludington.com/uploads/1/3/1/4/131453247/f4f476e0c7f09b6.pdf
    • http://files.lynngoldstein.com/uploads/1/3/1/6/131636866/mabubu.pdf
    • http://sulufuw.nscecommerce.com/uploads/1/3/1/4/131453526/debojijapuwuf_vuxukewa.pdf
    • http://zibujen.lakeodessaarts.com/uploads/1/3/1/4/131454215/tosivepekivo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/bhu_bsc_ag_previous_year_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0439/0741/6219/files/parliamentary_procedure_for_dummies_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7092/2655/files/zikebokebu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/950008851.pdf
    • https://cdn.shopify.com/s/files/1/0435/4369/1413/files/nofijara.pdf
    • https://cdn.shopify.com/s/files/1/0432/3514/7933/files/kejagisosujazow.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4719/files/manchester_united_vs_chelsea_match_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/99320718436.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/kizetigufi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8935/files/rarokeviwibipofuduk.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_off000046c2.bin
7d1f7b98ca0756afca993d2ec2f6d7f5cfec3153310519aad1e2d6524b3ebb17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C2 4772 bytes
font_01_sfnt_off00005707.bin
6bc46cf2c2ecd161213274926a0d83b4447df056adcfcfe9315c6d718722110c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5707 9888 bytes

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