Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9b23967ae091ac…

MALICIOUS

PDF

42.1 KB Created: 2020-08-30 03:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fd918e99f8818ffcbebf5f2eab0dd82 SHA-1: 14dcdf7283e35fb96ca80b8698d7c881d93e6198 SHA-256: cf9b23967ae091ac04e912d7f1e0332a30c95a72ffd7d446cb7b478f5eb0d6e5
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 PDF files hosted on Shopify. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/wix?keyword=allan+quatermain+livro+pdf'. This suggests the document is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. The document body text also contains the same malicious URL, reinforcing this attack pattern.

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/wix?keyword=allan+quatermain+livro+pdf
    • https://cdn.shopif
    • https://cdn.shopify.com/s/files/1/0431/4916/4705/files/2520350727.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/rodenufakexofitiwatega.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/powered_by_fractalum_earlier.pdf
    • https://static.usrfiles.com/ugd/79e5df_53b91202402242f9a69d6278c30f1113.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ed621cae4ff4374b95ba5c56f3b0acf.pdf
    • https://static.usrfiles.com/ugd/5af86b_25235b05506341869cc2a600cbd67f7b.pdf
    • https://static.usrfiles.com/ugd/edb4a7_e64d3a826ccb40c0921b86f297350810.pdf
    • https://cdn.shopify.com/s/files/1/0447/1917/7882/files/anemia_microcitica_e_hipocroma.pdf
    • https://cdn.shopify.com/s/files/1/0438/7323/9195/files/acrylonitrile_butadiene_styrene_safety_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/9673/4880/files/zoremafakevurav.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/raspberry_pi_opencv.pdf
    • https://static.usrfiles.com/ugd/c1108c_b854136b3ed04139a2507e796f585f52.pdf
    • https://static.usrfiles.com/ugd/b8c837_b291d8e5287540a7a20338fd5a39b0c9.pdf
    • https://static.usrfiles.com/ugd/1decf9_3f4ed8848f8f4ae796343b9bb42801c3.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_off000067d5.bin
4ed519d18617b8705b4cde00438b5055cd3fa8befb600b7c554fbcb5eb04d602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67D5 5184 bytes
font_01_sfnt_off00007969.bin
a94d2e532fad07759ed9ef13c3aab30d1a4ca7c655a82c8b6a7381c2c9e9a826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7969 9912 bytes

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