Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5da1bdf96dba44…

MALICIOUS

PDF

45.9 KB Created: 2020-08-08 00:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a3390e5c8bfa4a24d6dce0fc374d327 SHA-1: aed3ce057ba8cd6684b1ca3af6032769fdc31d75 SHA-256: bb5da1bdf96dba4492d3e9c75a2c4437fbf146207a9d5fb9b95b69eacd72a168
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 Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is likely the primary malicious payload delivery mechanism. The document body text, though partially corrupted, includes the search query 'biblia hebraica stuttgartensia pdf en español', indicating a lure to disguise the malicious link.

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=biblia+hebraica+stuttgartensia+pdf+en+espa%25C3%25B1ol
    • http://files.funlove2go.com/uploads/1/3/1/4/131438177/bopubaruzix.pdf
    • http://rezowap.dubaiactivelife.com/uploads/1/3/1/0/131070420/6953927.pdf
    • http://vasav.syxtrading.com/uploads/1/3/1/0/131070356/1412936.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/33753074398.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/41860056612.pdf
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/fagegaxapezinabom.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/kobedubovupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8440/7199/files/work_permit_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/zurabevepuwexu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7480/5148/files/chief_keef_new_mixtape.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/selazavuxamij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56751463133.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/raxeduwibebazurokolajafij.pdf
    • https://cdn.shopify.com/s/files/1/0429/3859/7539/files/kuxojijefiwemofolumubefu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9635/7530/files/59559670273.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_off00006fe7.bin
d5421c4cef5f4a9d179509e4c41c3eb30cce102f48c676b35546d7087f7a9f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE7 5820 bytes
font_01_sfnt_off0000836e.bin
8dc1dc900232cd8ed510960169ba7cdff367842e214411466223e11dffc3b2db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 11360 bytes

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