Malicious PDF — malware analysis report

Static analysis result for SHA-256 824198ae7e82412b…

MALICIOUS

PDF

62.2 KB Created: 2020-08-10 01:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e3628f49eede52e79991a1fb16dfbba SHA-1: 8a5b3a89d4bf9c248115b87a880f03727f15c9a4 SHA-256: 824198ae7e82412b5f17a13d9b0faf9c8b433f18e06eda2ee3df5d13ee71afff
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at `ttraff.ru`. The document body, though heavily obfuscated, appears to be a lure related to educational worksheets. The presence of a malicious redirector suggests the intent is to lead the user to a site that may host further malicious content or phishing pages.

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.ru/pify?keyword=solving+and+graphing+two+variable+inequalities+worksheet+pdf
    • http://files.rhbc29130.org/uploads/1/3/0/8/130874324/2868891b00fd.pdf
    • http://talojek.annieleeassociates.com/uploads/1/3/2/3/132302872/ebe03d3ad4b78.pdf
    • http://files.mpadvantage.com.au/uploads/1/3/1/3/131380438/xademadoburabeva.pdf
    • http://files.polishedspurtackco.com/uploads/1/3/2/6/132695530/kamoxufifovij.pdf
    • http://files.sciencetrek.ca/uploads/1/3/1/3/131378985/nitumekulan_fimekakud_jijidirenasir_xiguxeje.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/75728011586.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/nulelidasuvafewidizedij.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3381/files/beaufort_wind_scale.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7566/files/examples_of_alloys.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/25595449847.pdf
    • https://cdn.shopify.com/s/files/1/0450/4682/5110/files/alpha_lipoic_acid_supplementation_and_diabetes.pdf
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/behaviourism_vs_cognitivism.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/retinopatia_por_oxigeno_prematuros.pdf
    • https://cdn.shopify.com/s/files/1/0439/1924/5467/files/26068613164.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/ni_no_kuni_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/77519253301.pdf
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/78203281328.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_off0000ae65.bin
c04bd44694b0494a9a5f11d0f8c42a74ff234a65ae0b2f39da6f120f84836293
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE65 5888 bytes
font_01_sfnt_off0000c26e.bin
252ea28238d7ab68dc9e371dcf363ef1d691098209db9fec316045bd175142b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC26E 12652 bytes