Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3027fb948ce82d…

MALICIOUS

PDF

48.9 KB Created: 2020-08-10 04:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 662fad18e2c78b7e271fb95558634499 SHA-1: a08017f887e973ffa6b0ad81fe8d24d6fd455c14 SHA-256: cb3027fb948ce82d05533c5d2fb54798cc3dc5538feaab52de41134a206dc151
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text suggesting a lesson plan lure and includes the malicious URL. The primary malicious URL, https://ttraff.com/pify?keyword=relative+clauses+lesson+plan+pdf, is likely used to redirect users to a phishing or malware distribution site. The presence of a link farm further supports the malicious intent.

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=relative+clauses+lesson+plan+pdf
    • http://files.hartig.com/uploads/1/3/1/0/131070674/towizinizamule_jojoponiwozavo.pdf
    • http://files.u-surge.net/uploads/1/3/1/4/131438477/tojud.pdf
    • http://files.cflucktraining.com/uploads/1/3/0/8/130813841/407394.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/roxajabidexu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/benami_property_transactions_act_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/3081/3592/files/similar_words_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/9623/5415/files/enciclopedia_britannica_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3365514284.pdf
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/vosuju.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/annex_8_icao.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/16118009635.pdf
    • https://cdn.shopify.com/s/files/1/0439/9969/0910/files/creative_writing_assignments_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0435/8651/9195/files/vepafaweridofuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2986/4343/files/graphic_design_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/9633/2705/files/popofixamev.pdf
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/stihl_fs45_parts_diagram_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6463/files/98176346051.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_off00008220.bin
bdde57f6dd4710c247fca23a235371811bcd29d951bfbd4aff4122701b18057d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8220 5120 bytes
font_01_sfnt_off000093b0.bin
158b9d7c4bf16b96cbe8645ce85cf25530c7fff20f84914e086315e5432dc55b
pdf-font-stream PDF embedded font (sfnt) at offset 0x93B0 10240 bytes