Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8320558fad1c2c…

MALICIOUS

PDF

42.4 KB Created: 2020-08-24 01:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9112a3d0fb40314bc59cb3aab736606 SHA-1: 2fc6ca2cbc638fadf704ab312ee374c885a1df16 SHA-256: 1c8320558fad1c2ce69743653c341c308be1af89e7abeb9f03112b50852b1f7c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to `https://ttraff.com/pify?keyword=ofac+countries+list+2018+pdf`. This URL is flagged as a malicious redirector. The document body contains garbled text and the URL itself, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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.com/pify?keyword=ofac+countries+list+2018+pdf
    • http://files.dahliastudio.com/uploads/1/3/1/3/131381003/saviradovajanes.pdf
    • https://cdn.shopify.com/s/files/1/0440/2744/5398/files/jirijefijijojawon.pdf
    • https://cdn.shopify.com/s/files/1/0429/3325/6345/files/fulubezu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2471/7723/files/71087180862.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/apprendre_la_langue_allemande_pour_debutant.pdf
    • https://cdn.shopify.com/s/files/1/0428/3187/2166/files/karcher_pressure_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/tagisigopaboletuxek.pdf
    • https://cdn.shopify.com/s/files/1/0428/5733/2895/files/cakephp_3_email_attachment.pdf
    • https://cdn.shopify.com/s/files/1/0438/4702/4805/files/77141097231.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/metric_bolt_and_nut_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.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_off0000674c.bin
f2a58c21b6e22da43a0959b71d54519afa288323291796631a650e701c6a9d12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x674C 5696 bytes
font_01_sfnt_off00007aba.bin
f1669b2f1b1bab6885c374efe2ab82ecabf7d330398a74120093d1fe7775df50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABA 10080 bytes

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