Malicious PDF — malware analysis report

Static analysis result for SHA-256 43aa3322ddf3a3f4…

MALICIOUS

PDF

48.3 KB Created: 2020-08-21 17:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95e2c31d6091641c4bc682fcebb747e8 SHA-1: 1f433c21baea0dea808c380b528283ea167b1ed4 SHA-256: 43aa3322ddf3a3f4d4cfd20168fa1fba1ce9754ccb6a12528dbf0245f1175cbb
128 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, `https://ttraff.cc/pify?keyword=avast+free+offline+full+version`, is identified as a malicious redirector. The presence of a 'download button' heuristic further suggests a social engineering attempt to trick the user into downloading a file. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=avast+free+offline+full+version
    • http://gusidisuz.hatcherforgeandleather.com/uploads/1/3/2/3/132302978/d5642b8dbed4.pdf
    • http://files.moscofilia.com/uploads/1/3/1/4/131453251/6954ff6f936e.pdf
    • http://files.laceyfisherlpc.com/uploads/1/3/1/3/131381003/vemewagesex_niwuzuwu_murape_pomekosazodaje.pdf
    • http://files.theoaksmith.com/uploads/1/3/2/6/132695707/3332206.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/najaxur.pdf
    • https://cdn.shopify.com/s/files/1/0428/2014/1223/files/fumifudizojatapunu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/50621474479.pdf
    • https://cdn.shopify.com/s/files/1/0436/2308/8290/files/42937174809.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/20279135081.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/fuxisavajevemon.pdf
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/alprazolam_0_25_bula.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/31938570888.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9950/files/bodybuilding_eating_plan.pdf
    • https://cdn.shopify.com/s/files/1/0435/4208/5783/files/fitivodofenorob.pdf
    • https://cdn.shopify.com/s/files/1/0428/2079/6583/files/76124672426.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/xuvozidirisokavu.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
font_00_sfnt_off00007225.bin
69ee24a9cd4e83717b9c3e49870c5354e129cda90ed0011a57d62af3c74a6b06
pdf-font-stream PDF embedded font (sfnt) at offset 0x7225 4692 bytes
font_01_sfnt_off00008222.bin
f00737535142c2d6a4296db47a450799bd4e0fc5486beb3e06ba5a7b69b9a09e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8222 10408 bytes
font_02_sfnt_off0000a5ca.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5CA 4324 bytes