Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb557aa9ae684a3d…

MALICIOUS

PDF

49.0 KB Created: 2020-08-13 02:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48838d33068cfeedd008e712ae481439 SHA-1: bcce4c9f15575734e648b6e385cc860ed40fe508 SHA-256: fb557aa9ae684a3da62b93af67a85f45d5427a4993bf5bc8a165f8edb9d2c540
160 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to known malicious infrastructure at ttraff.cc. The document also provides password instructions, suggesting it is a lure for a password-protected archive, likely containing a malicious payload. The primary attack pattern involves tricking the user into clicking a malicious URL, which then leads to further compromise.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wb?keyword=compressible%20fluid%20flow%20patrick%20h%20oosthuizen%20pdf
    • http://files.fisherah.com/uploads/1/3/1/6/131606408/325718e0eb9.pdf
    • http://wesikat.comesailingcharterschicago.com/uploads/1/3/1/4/131437361/mugerulixojobo.pdf
    • http://files.angelsofcharity.org/uploads/1/3/2/6/132682976/2887096.pdf
    • http://gotoji.moenkopimemories.org/uploads/1/3/1/6/131606490/8390495.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/68004318332.pdf
    • https://cdn.shopify.com/s/files/1/0438/4676/2656/files/pasibo.pdf
    • https://cdn.shopify.com/s/files/1/0451/1278/7109/files/alkynes_preparation.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/pesipaworobaderoloxivav.pdf
    • https://cdn.shopify.com/s/files/1/0431/7547/7416/files/45584644703.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/ingobernable_netflix._webrip_trollhd.pdf
    • https://cdn.shopify.com/s/files/1/0428/3269/1363/files/gedenulomuliresuvok.pdf
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/statistical_analysis_with_ms_excel.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/15101309184.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/buwomotimivapajuroja.pdf
    • https://cdn.shopify.com/s/files/1/0430/2694/0067/files/66804160415.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000094d1.bin
249629f5d7cd40e3fe3df1f630e6aa578100a97535a30393e5c038300bfc5426
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x94D1 20388 bytes
font_00_sfnt_off00005e77.bin
0bc65d919048e830a9b9f8ab1a1de8b7ee4e9300b3c644632a374e53b17ad4c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E77 5644 bytes
font_01_sfnt_off00007190.bin
aa291de57f42cb668fccfeab1163f1bdc5fdb3cb217c7a49eba35714670a0937
pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 10420 bytes