Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc217c0fb18cb83f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-06 18:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45b537e7a1edb37f65aa69c9736c2884 SHA-1: 00de7f4ebecabdcf81aa029d22e2f5cc490015e0 SHA-256: dc217c0fb18cb83f8588159418e57247eddaaf865734c8eeefb964907ca31ac0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though partially corrupted, contains text related to 'antonyms and synonyms list with telugu meaning pdf' and the URL 'https://ttraff.cc/pify?keyword=antonyms+and+synonyms+list+with+telugu+meaning+pdf', suggesting a lure to a malicious site disguised as an educational resource. The presence of numerous Shopify-hosted PDF links, while many are benign, contributes to the overall SEO link farm characteristic.

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=antonyms+and+synonyms+list+with+telugu+meaning+pdf
    • http://files.crushcop.com.au/uploads/1/3/1/4/131483097/mivujexaxinotevapiw.pdf
    • http://files.helenmcwilliam.com/uploads/1/3/1/4/131453592/402e247d33.pdf
    • http://files.naturalrelief.ca/uploads/1/3/1/4/131406736/95d61f1ec9052.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/809783425.pdf
    • https://cdn.shopify.com/s/files/1/0429/2693/2124/files/67231203446.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/94726826070.pdf
    • https://cdn.shopify.com/s/files/1/0437/9056/5537/files/git_stash_pop.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/algorithms_robert_sedgewick.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/fofitolerazep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepudanunakadop.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/37470632124.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3205/files/porugiwopolerujakitug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5903401900.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4056/files/borupoxemunelajugawune.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_off00005f95.bin
f86babd473e17778fcb175b58dfdb5cf945a0ff2cd073d086981a20ba0fc8201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F95 5540 bytes
font_01_sfnt_off00007266.bin
ea36a5015aaba354547b9d95709e6710b5a9123d2643783f5ee94b494cac6272		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7266 11640 bytes

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