Malicious PDF — malware analysis report

Static analysis result for SHA-256 8337814844abbe9c…

MALICIOUS

PDF

40.3 KB Created: 2020-09-03 09:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 530ca68d77c0ef889ebd9a340e2c2b61 SHA-1: fc7d7acc7e6b6e3effbd362c5630cc010353e718 SHA-256: 8337814844abbe9c1985331c63c4989e3bdc6079bbd228814b2db4615a0a6039
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=bomber+crew+trophy+guide'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, with the first being 'https://cdn.shopify.com/s/files/1/0435/9746/3715/files/xufududumofuzedizovetef.pdf'. The document body, though heavily obfuscated, contains references to the malicious URL and the benign-looking PDF filenames, suggesting a lure to a malicious site.

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.me/wix?keyword=bomber+crew+trophy+guide
    • https://cdn.shopify.com/s/files/1/0435/9746/3715/files/xufududumofuzedizovetef.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3990/files/syngamy_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/96409309231.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/wepup.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30740110423.pdf
    • https://static.usrfiles.com/ugd/e6092c_015e40631e8d418d82469ca852fc1361.pdf
    • https://static.usrfiles.com/ugd/eb6612_4b625a332b9b495d809c6c5fd26e1ad8.pdf
    • https://static.usrfiles.com/ugd/4cf28d_83e1f8bf573e438db4d751db39751e5b.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/shopify_60_day_trial.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/al_quran_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8863/files/any_man_of_mine_rachel_gibson.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2919/files/51913972824.pdf
    • https://cdn.shopify.com/s/files/1/0440/8888/5413/files/lomika.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_off00005ffc.bin
ef8a1aede89b51d936aa7cf8fe4d22d4148667e87239b57783372cc30543a934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFC 5452 bytes
font_01_sfnt_off00007273.bin
10da7caf6b9b8da6e1308f9453122184e49dc97843a56b5a56595d146e20f2c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7273 10120 bytes

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