Malicious PDF — malware analysis report

Static analysis result for SHA-256 e190a1f7cdf4f084…

MALICIOUS

PDF

40.8 KB Created: 2020-08-04 08:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a91e3989c70ba63450920dffe06f4890 SHA-1: c71bbe72ae6cd7b42370fee03e164faa4b51e581 SHA-256: e190a1f7cdf4f0845d38dae6e6e24089de7939e163ea3e44c82cf4997f99d0be
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to coloring pages. The presence of a link farm heuristic further suggests malicious intent to distribute links. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=mosaicos+para+colorear+por+numeros+pdf
    • http://files.laohalbany.org/uploads/1/3/2/6/132681928/powisusuba.pdf
    • http://files.illuminatingideas.org/uploads/1/3/1/4/131438823/tasexogejotemod_safutedapewano.pdf
    • http://files.alexandrazellerarted.com/uploads/1/3/1/4/131482866/9179346.pdf
    • http://files.ammoniteyarns.co.uk/uploads/1/3/0/7/130775658/vugegubupivig.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/19793693086.pdf
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/rikasemuvekitizevovawug.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/worotivujir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/84829248727.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/razer_synapse_not_detecting_keyboard.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/vimulowurademabiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/gejetoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/20562141560.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/27798317162.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/59535660684.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/nazawulolizutinosurikifam.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/11239583556.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/widewakosekoxuras.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_off0000499e.bin
3b7f185b347cbeb58257f6761596087a2ed13c734e2fd5ce954c6b47e5755006
pdf-font-stream PDF embedded font (sfnt) at offset 0x499E 5304 bytes
font_01_sfnt_off00005b99.bin
8d3c07601aeeebf8b8ba5b514855b1eb80a89e4258aaf97b34bbb15dc3be8070
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B99 10748 bytes
font_02_sfnt_off00007ef0.bin
18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF0 16144 bytes