Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eca0a2cebcff01f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-05 10:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4472d5a9741568c66e37236ec0c8d76 SHA-1: 6a92af54d9b0a1b7380458e195254bbbe9d7b12d SHA-256: 3eca0a2cebcff01f45b1cd348d9f25cb598284d9855e306b3d32048fcad923aa
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains text related to '5th grade math book pdf' and the malicious URL, suggesting a social engineering lure. The presence of numerous external PDF links, including the malicious redirector, indicates an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=5th+grade+math+book+pdf
    • http://dekoju.teensvillerecords.com/uploads/1/3/2/3/132303189/jogova-direvawedowibaf-muwogujiri.pdf
    • http://files.filipinocursillosf.org/uploads/1/3/1/3/131378990/sofalevabe.pdf
    • http://files.bbluntsheabutter.shop/uploads/1/3/1/0/131071041/gorexezumudofejur.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/animal_crossing_new_leaf_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/6872427657.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9874/files/puxolujim.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/15728848607.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/93665608041.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/kim_k_game_hacks.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerisorajomowuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/mofukig.pdf
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/sozuzibemokil.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/zagufigugunag.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/87527773126.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_off00006423.bin
c18dbe08e4eaab00b2aa583615587711b9ead9ae5d89d83af983b3a04e9dfcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6423 5480 bytes
font_01_sfnt_off0000769c.bin
2b4b1382d0477b689741d5b6c7fad7655c5f6fcfc5631e9daab68187544d8217		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769C 10160 bytes

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