Malicious PDF — malware analysis report

Static analysis result for SHA-256 36cc9d44cddfc828…

MALICIOUS

PDF

99.0 KB Created: 2020-08-10 09:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc073130a049edff143606704af23b39 SHA-1: 847373504eec566c1ce326d0524e1f06218807be SHA-256: 36cc9d44cddfc828d8c1a4951b1f254ca5d033cd3355ec707a413f645d725293
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware delivery. The document body, though heavily obfuscated, contains the malicious URL. The PDF was generated using wkhtmltopdf, and it hosts a large number of external PDF links, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=applications+of+derivatives+class+12+ncert+solutions+pdf
    • http://files.lapen.us/uploads/1/3/0/8/130874143/keguduwa_miboxesoxodomag_vikinetixefosi_durapu.pdf
    • http://dewaf.clebelleza.shop/uploads/1/3/2/7/132712207/35f1f0fabb.pdf
    • http://mogatod.ediblelandscapes.net/uploads/1/3/1/6/131606060/durudibuvonozopo.pdf
    • http://defod.eteambuilding.co.uk/uploads/1/3/1/8/131856158/aff871a2bdc0053.pdf
    • http://files.hermanus-festivals.com/uploads/1/3/0/9/130970004/842bb774068.pdf
    • https://cdn.shopify.com/s/files/1/0435/6472/8479/files/malayala_manorama_year_book_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/0945/6803/files/toxatetemuwanaworuxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/lawepiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/7960/6177/files/53524088822.pdf
    • https://cdn.shopify.com/s/files/1/0440/5719/8742/files/lightweight_reader_windows_xp.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/gixatavogaxifov.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/contoh_soal_medan_magnet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/zojegexipujele.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/wimepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/tuzuwisetudej.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/bandsaw_fence_plans.pdf
    • https://cdn.shopify.com/s/files/1/0434/8359/4909/files/neca_labor_units.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_off000120d9.bin
a7e2f7b48918e0e4db63e72fe032fb06ea71f20ea545f72331864e3a229a3015
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D9 5380 bytes
font_01_sfnt_off00013341.bin
74674bdc6d4993ae9f16b363c30fd24f7e756e19710d691dd297fe2cb09c634d
pdf-font-stream PDF embedded font (sfnt) at offset 0x13341 16440 bytes
font_02_sfnt_off000166be.bin
a470468b343cf0de274471c5386ead9c3df438e92e5574cbe9179f53d87b8933
pdf-font-stream PDF embedded font (sfnt) at offset 0x166BE 16584 bytes