Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50f3a61cb7ab3b9…

MALICIOUS

PDF

78.5 KB Created: 2020-08-01 00:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a1f3afbde7f8b12f93f30ca438b40f4 SHA-1: eabaa6ac59456cff1e4dc627f3ded51f1cc3222a SHA-256: c50f3a61cb7ab3b9ac6e93a1cebf747a038e02b2533fc8751428c9d282960a79
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru' with a keyword suggesting a lure for a 'milling machine manual pdf'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary goal is to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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.ru/pify?keyword=milling+machine+manual+pdf
    • http://files.hamanncommunication.com/uploads/1/3/0/7/130775249/484850.pdf
    • http://files.leedspeacepoetry.com/uploads/1/3/1/3/131383483/7691100.pdf
    • http://files.waxedbylaurie.com/uploads/1/3/1/6/131606866/6b09d0ef70627.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/69824192042.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/lil_wayne_carter_4_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/gutuvimesasijelomuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5569/3470/files/59459675677.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/15214600450.pdf
    • https://cdn.shopify.com/s/files/1/0432/5769/2315/files/mumulorekute.pdf
    • https://cdn.shopify.com/s/files/1/0430/1268/5977/files/34472747875.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6119/files/32087596374.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/41726890872.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/lucky_lunch_stardew.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/30360257015.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/coming_together_michael_jackson.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voriwatovetizejewadodo.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_off0000f70b.bin
9832e3bfe7a9f7d0784e725bb560068e97d74b31ce425467075c4fae11b64dc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF70B 5300 bytes
font_01_sfnt_off000108ff.bin
29e0fcca85512f116b94c1bd9050d2aa8424334e90bf683d0f69aa1662f8c792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108FF 10524 bytes

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