Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aaeac58fb5a7399…

MALICIOUS

PDF

42.0 KB Created: 2020-08-20 08:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7b0144b43e2e96aed31284c8b2d1afc SHA-1: 08f9a5f830d838ef7109f48165058bc437061c20 SHA-256: 4aaeac58fb5a7399d1e00cd4557bf13b46ae423fbeca467f5d7069aaeeccd0c8
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL for the malicious redirector. This indicates a phishing or scam attempt designed to redirect users to malicious infrastructure.

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=active+and+passive+voice+sentences+examples+pdf
    • http://fisur.gcmafproducts.com/uploads/1/3/0/7/130776661/7c830a5c0e.pdf
    • http://files.starcityhomer.com/uploads/1/3/0/9/130969656/1402294.pdf
    • http://tanova.madcityparagliding.com/uploads/1/3/0/7/130775413/mukijesoru-sarukik-wotuxobo-safufukavirop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/autosmart_spirit_lake.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0481/files/89223134608.pdf
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/da_turdy_point_buck.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0503/files/mavukaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5156/files/zasutifibivawetu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/avast_activation_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/zukodorudeveburam.pdf
    • https://cdn.shopify.com/s/files/1/0437/1339/6901/files/kabusaso.pdf
    • https://cdn.shopify.com/s/files/1/0429/3482/9223/files/dodifakasorumomozagebupa.pdf
    • https://cdn.shopify.com/s/files/1/0440/5785/4102/files/jizefudininirukeluka.pdf
    • https://cdn.shopify.com/s/files/1/0439/3422/0456/files/93735288527.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9974/files/38192116107.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_off00006671.bin
0968f58c98bee9dcec0ee6f4b8d32ce28fe53aad28f32dafc6232be4152ee633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6671 5324 bytes
font_01_sfnt_off00007884.bin
71a203f03f1c390c3bbe045a822f64bb1288241bbc57600012badf4e705890c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7884 10192 bytes

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