Malicious PDF — malware analysis report

Static analysis result for SHA-256 2958bc4b02c5e318…

MALICIOUS

PDF

54.2 KB Created: 2020-08-06 03:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51a2039ebe360a097619ab0a1f0e6a67 SHA-1: 8e9ba675cad9a1138a6b5f2460afb115829a4955 SHA-256: 2958bc4b02c5e3180751f4277a011cb6e4933ac83b73d84254a67f214762cc04
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.com/pify?keyword=caso+clinico+anemia+sideroblastica+pdf, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a coordinated effort to distribute malicious content under the guise of legitimate documents.

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.com/pify?keyword=caso+clinico+anemia+sideroblastica+pdf
    • http://vazefiga.stmarktoledo.com/uploads/1/3/1/4/131453247/5567574.pdf
    • http://files.lifesolutionsfitness.com/uploads/1/3/1/3/131397973/5641775.pdf
    • http://nijir.floridacoalitionalliance.org/uploads/1/3/1/8/131857315/rafolurewamiz.pdf
    • http://files.prinevillenazarene.org/uploads/1/3/1/4/131482959/rejinuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/6961/1935/files/88121251071.pdf
    • https://cdn.shopify.com/s/files/1/0438/5393/8853/files/62063605656.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80463449019.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7271/files/xiwokewoj.pdf
    • https://cdn.shopify.com/s/files/1/0444/0319/6070/files/boilsoft_video_spiltter.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1535/files/rokudimufef.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/jabegexefab.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/c_math._h.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/nelolewerozopad.pdf
    • https://cdn.shopify.com/s/files/1/0430/1789/6089/files/bepiviwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9589/files/11284506611.pdf
    • https://cdn.shopify.com/s/files/1/0431/2779/9969/files/gufikigem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/leforaziredawiwibutufemej.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_off0000854b.bin
20e568e2019ec23a0c3fce865875725eab0de7b2857c1a333b191308182c15c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x854B 4888 bytes
font_01_sfnt_off0000961f.bin
1de49b9e33549b8576032d5103b1e01919b2215ee77b1bb0f384f265c54ac819
pdf-font-stream PDF embedded font (sfnt) at offset 0x961F 5344 bytes
font_02_sfnt_off0000a825.bin
4661296b8b817296c160a807341a1b579dc3b7b32c233f22b4a63eb24b4724e2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA825 10388 bytes