Malicious PDF — malware analysis report

Static analysis result for SHA-256 c428f83c65d74ac5…

MALICIOUS

PDF

52.5 KB Created: 2020-08-05 06:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 668bd8aa6f24461d540a5365bcfac08a SHA-1: 625ecfb1b3d1d8c5ecedcaf2ecb460bf651c9bba SHA-256: c428f83c65d74ac58098a329337e36725a9e449225df172dc809fe191224a78a
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a known malicious redirector (ttraff.com). This indicates a likely attempt to redirect the user to a malicious site for phishing or malware delivery. The document body, though heavily obfuscated, contains the URL that triggered the heuristic, reinforcing the malicious intent. The presence of a link farm suggests an attempt to game search engine results for the PDF.

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=historia+del+bienestar+laboral+pdf
    • http://files.taprootfarmwv.com/uploads/1/3/0/7/130775840/ropilavubi-joxeruwenu.pdf
    • http://files.ianlinden.com/uploads/1/3/1/1/131164016/rikobusadatovup_vobazom_debobexi.pdf
    • http://files.lifestylemagazineflorida.com/uploads/1/3/0/9/130969206/luliredes.pdf
    • http://files.iemespsc.com/uploads/1/3/1/3/131379844/pufasogosavenowawit.pdf
    • http://files.reinventionandrecovery.com/uploads/1/3/0/7/130776852/lifazewumipebox.pdf
    • http://files.taprootfarmwv.com/uploads/1/3/0/7/130775840/ropila
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/nibetibujutikap.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/62234491244.pdf
    • https://cdn.shopify.com/s/files/1/0439/9159/7214/files/83312667458.pdf
    • https://cdn.shopify.com/s/files/1/0435/4660/7784/files/46272223058.pdf
    • https://cdn.shopify.com/s/files/1/0430/1497/9737/files/9893660821.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/puxifofisuwimejejotajede.pdf
    • https://cdn.shopify.com/s/files/1/0430/7766/4929/files/28967791135.pdf
    • https://cdn.shopify.com/s/files/1/0436/3101/8142/files/first_and_last_name_generator.pdf
    • https://cdn.shopify.com/s/files/1/0437/0304/2216/files/pdf_to_word_nitro_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/asian_tigers_history.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/2002_jeep_wrangler_owners_manual_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/8039/3639/files/michael_beckwith_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/ti_whatever_you_like._mp3.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_off00008d12.bin
66db46798443f5fb8627dfb1ec947a69b0e342e08c073f8f5c0bf0f12a324eda
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D12 5136 bytes
font_01_sfnt_off00009e8c.bin
58520e8ef335d3dca5d1417672d34d67e0ecdf8e10eaa02dffbb2e2b41285c07
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8C 11240 bytes