Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb306b49e3fc649…

MALICIOUS

PDF

35.3 KB Created: 2020-08-12 16:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47bb6afd1579cacfca767bdceae16593 SHA-1: 283292a77755f8ee9a86a163d42d892424ba1288 SHA-256: 9bb306b49e3fc649efbc87cd57af49e0489e341df10dd90b36786bd4d2ecb5a7
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate study material, but the primary URL redirects to known malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the initial link is a redirector. The document body, though heavily obfuscated, contains the target URL and references to 'wkhtmltopdf', suggesting it was generated programmatically to host these links.

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=wordly+wise+book+7+answer+key+pdf
    • http://files.redmondmathblog.com/uploads/1/3/2/3/132302923/8512698.pdf
    • http://files.hayfieldsecondarychoirs.com/uploads/1/3/1/4/131455832/pezerimakewusezufip.pdf
    • http://bamewax.zjymbp.com/uploads/1/3/1/4/131438539/sumoma-jeditirom-lokuf.pdf
    • http://kolokulen.judithrpetersonphotography.com/uploads/1/3/0/7/130776485/5917258.pdf
    • http://vevuzoki.australasianeducare.com/uploads/1/3/1/3/131383791/667705.pdf
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/68006364164.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/dapisomegovexenol.pdf
    • https://cdn.shopify.com/s/files/1/0431/0292/9047/files/majus.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/60989486105.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5574/files/454626453.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/12032410060.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/the_murderess_alexandros_papadiamantis.pdf
    • https://cdn.shopify.com/s/files/1/0441/0173/0456/files/jasevewe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/rodexubugi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/xitomusinidelikib.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/cashew_nut_shelling_machine_design.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/felamewupidavemuzisol.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1924/files/free_english_urdu_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/43896845256.pdf
    • https://cdn.shopify.com/s/files/1/0429/9839/9139/files/degifupijabosuboridimur.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_off00004bce.bin
c128f5bf6d3d1982bff6ee5a316d1a03e200c501f8eb0e82669be84994f25885
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCE 5528 bytes
font_01_sfnt_off00005ec9.bin
ca40fa1c144a4a8d852696f828bdc64c2610cac6ef682e9c4c3869a5adb6f388
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC9 9720 bytes