Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfb08594d037bb7d…

MALICIOUS

PDF

40.0 KB Created: 2020-07-25 19:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 498f385c18a11b2786fff0e0eda39748 SHA-1: 692ca1d49d39f56673ce97f708748fdcb8c3528a SHA-256: dfb08594d037bb7dda9f7759416caf231eeff3ae3fe625bbdf8f1ae82fae7a2d
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is presented within the document body, which is heavily obfuscated but appears to be a lure for educational worksheets. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains, likely to obscure the malicious redirector.

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=comprehension+sequencing+worksheets+for+kindergarten
    • http://files.professorwillis.com/uploads/1/3/0/9/130969819/3536095.pdf
    • http://files.realtalkwsimone.com/uploads/1/3/0/9/130969166/6377380.pdf
    • http://files.soulvisionhealing.com/uploads/1/3/0/8/130813025/gizajone-xijajijaxer-xotosi-moxokimira.pdf
    • http://files.professorwillis.com/uploads/1/
    • https://cdn.shopify.com/s/files/1/0436/5117/0457/files/91541849483.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/metozubisep.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/48277318068.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6200/files/40163364612.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/dafot.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/43600211759.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/gefotolovadepevoned.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/nuburaxezedag.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/94612255591.pdf
    • https://cdn.shopify.com/s/files/1/0436/4464/9630/files/3708135652.pdf
    • https://cdn.shopify.com/s/files/1/0434/5898/6150/files/46038200059.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/kemevidofujusej.pdf
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/93534009924.pdf
    • https://cdn.shopify.com/s/files/1/0431/9041/9620/files/3317476433.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_off00005d74.bin
620028a78c8c885068908b8fa53c16c2c1ae01bff23639acd9b0277d5db90bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D74 5724 bytes
font_01_sfnt_off000070d3.bin
851ee822d6b5753e5c3c3e305b149b33adcfbdbac5b32d0fa519569676dd2ba6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70D3 9784 bytes

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