Malicious PDF — malware analysis report

Static analysis result for SHA-256 56bf1ea0dac34477…

MALICIOUS

PDF

42.9 KB Created: 2020-07-30 07:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f026d7617565afd3f75dd1028c49d16 SHA-1: 2fe92a41346228b70660240741ef201ab1a0d77e SHA-256: 56bf1ea0dac3447726e83956cd59ff50c94be205ad88599d99bbaf2354b62f92
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm pattern, with numerous links to external PDFs, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs. The primary attack vector appears to be directing users to a malicious URL.

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.com/pify?keyword=ecology+ncert+pdf+download
    • http://files.photographyfromthesoul.ca/uploads/1/3/1/3/131380596/vovujez_duwamiwe_farulasefaxe_nesija.pdf
    • http://files.winningmentalitygroup.com/uploads/1/3/0/8/130813516/pirifiz.pdf
    • http://files.rachaelsthoughts.com/uploads/1/3/1/6/131606789/gifimomuneku-dijatazexe-sizivamelum.pdf
    • http://files.david-blue.com/uploads/1/3/2/6/132681438/46303.pdf
    • http://files.teachingelementaryspanish.com/uploads/1/3/0/8/130873718/nesafamep_zomiwobam_wajutavirenipo_rowitunasa.pdf
    • http://files.rachaels
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/ramokufewipenegexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0881/8333/files/xitukomemotomifas.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4485/files/83578223674.pdf
    • https://cdn.shopify.com/s/files/1/0428/6090/4615/files/58140947277.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/totusabe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/8028389218.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6081/files/zupesekipupopemojinowes.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/17072625231.pdf
    • https://cdn.shopify.com/s/files/1/0434/2395/7144/files/99895024350.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/bilojedejasunefivijadix.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/52687826860.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/78061715656.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_off00006c2a.bin
f7ed50a9b98ff5d36f1903fe27974e83d1eb99e4684705cef98b09379e4509a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2A 5036 bytes
font_01_sfnt_off00007d6d.bin
c5356c22333e570575cf287f84d160264cf389f074bb0af5bc84f5a0a3f0bbc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6D 9732 bytes