Malicious PDF — malware analysis report

Static analysis result for SHA-256 5339d3c5e0fa4e9c…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 01:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f8d60be4391dfa3e08636df67aa5f1 SHA-1: 38c0c640225036541bcb603c12ea74820cee5e22 SHA-256: 5339d3c5e0fa4e9cf3027b76669cd4f452f78af377db20d27e44130f36202211
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=blessed+assurance+music+score+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on cdn.shopify.com. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector suggests the document's primary purpose is to lead the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=blessed+assurance+music+score+pdf
    • http://files.liorgeller.com/uploads/1/3/1/3/131398139/rifulojobelan.pdf
    • http://pisuv.athensdentalpartner.com/uploads/1/3/1/3/131379730/7045424.pdf
    • http://files.letscreatewithbonnie.com/uploads/1/3/0/8/130874647/eed4b31a4db1c58.pdf
    • http://files.canalsigling.com/uploads/1/3/1/3/131383018/8717392.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6378/files/patriots_vs_lions.pdf
    • https://cdn.shopify.com/s/files/1/0430/4040/7701/files/japisivefidoviwomikifusij.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3589/files/3835807328.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/firiresupokojo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/87901088510.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/xepibesatekokexajaxiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/39933692386.pdf
    • https://cdn.shopify.com/s/files/1/0428/1656/9500/files/vafelunesuwet.pdf
    • https://cdn.shopify.com/s/files/1/0428/5032/0540/files/kajijulerudapebipu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1807/4786/files/eduardo_galeano_memorias_del_fuego.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/86276982816.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/junas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/fasojenifujimox.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_off000061f5.bin
860d540aff609405ade63569289b57e6a69ca7f874aca910252d87c2e5821436
pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 5348 bytes
font_01_sfnt_off0000740e.bin
a36263a6bf6240c205310044b3d8e920d34e255abc23df72b5571e1846b4f2ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x740E 14424 bytes