Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad39f5793ed6d58a…

MALICIOUS

PDF

41.4 KB Created: 2020-08-29 04:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ecb4c90ed2c9416c7f1c942d2ba104b SHA-1: 5f1a29b2e13e86a27a5ea519a09cbb98dac4bbfd SHA-256: ad39f5793ed6d58a0872496c2d88a8e28be62f588f21607c31c1b2c1be371e13
120 Risk Score

Malware Insights

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

The PDF file contains a deceptive document body masquerading as setup instructions for a WiFi extender. It embeds a link that is identified as a malicious redirector, which is a common technique for delivering malware or phishing pages. The file also contains a large number of external links, many pointing to Shopify, suggesting a link farm or SEO poisoning attempt to increase visibility.

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.cc/wix?keyword=msrm+us750+wifi+extender+setup
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/78461469005.pdf
    • https://cdn.shopify.com/s/files/1/0460/9182/9412/files/jidow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0435/4103/7207/files/36940179531.pdf
    • https://cdn.shopify.com/s/files/1/0430/6832/6042/files/ntn_bearing_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/32041892171.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/javascript_string_to_lowercase.pdf
    • https://cdn.shopify.com/s/files/1/0447/2917/2122/files/amnesia_retrograde_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/76608448476.pdf
    • https://cdn.shopify.com/s/files/1/0437/3089/4999/files/coursera_machine_learning_classification_quiz_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/how_to_become_a_better_husband.pdf
    • https://cdn.shopify.com/s/files/1/0459/9175/5938/files/bomgar_jump_client_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/a_travs_del_vaso_acordes.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6135/files/8429624909.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/bdc_general_anatomy_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6343/files/appli_carte_du_ciel_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7394/files/murlin_trebuchet_plans.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_off0000632c.bin
1aa279fa3393b9b5e64ac29a2dd16732b3802be77af1fc3f25648421125274d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632C 5456 bytes
font_01_sfnt_off000075ce.bin
0168a1d6083363c1d5524d955f73f2972f26ccc103429e34683778e1eb1fd357		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CE 10272 bytes

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