Malicious PDF — malware analysis report

Static analysis result for SHA-256 53895c0eb9fd1dcf…

MALICIOUS

PDF

43.6 KB Created: 2020-08-17 09:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b8507489445a8ab8cc0f501cbc74e5a SHA-1: 14671c5668d2aadc8b5b7d563c6aa2df2ad492fb SHA-256: 53895c0eb9fd1dcfe090d87733251acba2f4960820b8d53304e0511f51f0213f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=asap+bold+font', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted, limiting further analysis of the payload.

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/pify?keyword=asap+bold+font
    • http://nulef.greenuplearningcenter.com/uploads/1/3/1/3/131384281/xurip_rodigowe_mibesakesosazam.pdf
    • http://riwet.gmtmt.com/uploads/1/3/1/3/131398140/zolev.pdf
    • http://kejopi.charhendricks.com/uploads/1/3/2/6/132681670/2a517d80ad7c9.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/32180531143.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/bezedofuzidudirimubijoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0821/files/xededoramekavozotoga.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0231/files/oou_admission_list_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1562/files/92710970478.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/39599216384.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/rewukoramawajulababap.pdf
    • https://cdn.shopify.com/s/files/1/0444/8436/2407/files/the_art_of_war_visualized_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/dukefij.pdf
    • https://cdn.shopify.com/s/files/1/0434/9575/1842/files/delakejigeguj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34996744553.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_off00006187.bin
10b6294ce65f50f549ea50ec51522fb1f8ceaa9cbe544cbf08ce62639814c843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6187 5068 bytes
font_01_sfnt_off000072d0.bin
2c5051655d4733617b8902f37d84932e5e7bacbcc3694a7bcf6a9eb67c8f69e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D0 15020 bytes

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