Malicious PDF — malware analysis report

Static analysis result for SHA-256 28bb259d413fb52e…

MALICIOUS

PDF

45.1 KB Created: 2020-08-08 10:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80d889e6842b3c95fc2fd82aeacc1859 SHA-1: d34a8863641b6415de6c3fa55fa940a4de947299 SHA-256: 28bb259d413fb52ed3bda81215321cf17f27addd2f3eb4cbff7860a4f037b717
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the string 'Universal antidote pdf' and the malicious URL, suggesting a lure to trick users into clicking through to potentially harmful content. The presence of a link farm further supports the malicious intent.

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=universal+antidote+pdf
    • http://files.academiapaphou.com/uploads/1/3/2/6/132681415/8522697.pdf
    • http://files.martienvanzuilen.com/uploads/1/3/1/1/131164488/rukavasatigomuw-mopoxegaj.pdf
    • http://files.m4detail.com.au/uploads/1/3/0/7/130739544/xapawexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/gupofarunapewojareras.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/99261092187.pdf
    • https://cdn.shopify.com/s/files/1/0430/4797/7114/files/cervical_spondylosis.pdf
    • https://cdn.shopify.com/s/files/1/0436/3350/8512/files/29067263206.pdf
    • https://cdn.shopify.com/s/files/1/0432/8488/9758/files/resatibofebuxijuwarekex.pdf
    • https://cdn.shopify.com/s/files/1/0437/0409/0792/files/voladuwalukokagutamedofig.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82505274200.pdf
    • https://cdn.shopify.com/s/files/1/0436/6771/8309/files/xutop.pdf
    • https://cdn.shopify.com/s/files/1/0437/8371/7015/files/pawososogadu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/zibolijulotinagatumudone.pdf
    • https://cdn.shopify.com/s/files/1/0429/1097/4108/files/83170851900.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/70349667502.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/writing_equations_from_graphs_worksheet.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_off0000612b.bin
85133c23b17f37004be56e48552af916c266b1f00393513dfa916e48486cb821
pdf-font-stream PDF embedded font (sfnt) at offset 0x612B 4876 bytes
font_01_sfnt_off000071c9.bin
98581d5ca46c6c6be18f6c0d45bcdd81fe5625d74604b90bad1fcb6887599f7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C9 11964 bytes
font_02_sfnt_off00009969.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9969 4324 bytes