Malicious PDF — malware analysis report

Static analysis result for SHA-256 3517ba85d06e457f…

MALICIOUS

PDF

45.8 KB Created: 2020-08-11 21:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8669495da46e678051ad0c746201d507 SHA-1: 65849950ea3cde00e013a3dcb392d5484747b216 SHA-256: 3517ba85d06e457f6eda2d0212d1ba9c16282b61c740cf32cb254f10dc47e0b1
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a free software download. The document body, though heavily obfuscated, contains the text 'Pdf printer windows server 2012 free' and the malicious URL, indicating a social engineering lure. The presence of a large number of external links, many pointing to Shopify domains, suggests a link farm used for SEO poisoning to attract victims.

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/wb?keyword=pdf%20printer%20windows%20server%202012%20free
    • http://kejapujol.kirkmahoe.com/uploads/1/3/1/3/131380183/kipevexuk.pdf
    • http://files.artforourselves.org/uploads/1/3/1/4/131453695/9ecbece85dd2.pdf
    • http://files.originalartbyjoe.com/uploads/1/3/0/7/130776206/ec6c73.pdf
    • http://files.johnwilliamscounseling.com/uploads/1/3/0/7/130776054/126eb8710.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/79120623333.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/periodic_table_with_electron_configurations.pdf
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/28938277212.pdf
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/dbt_skills_training_manual_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/99309181678.pdf
    • https://cdn.shopify.com/s/files/1/0448/0807/7473/files/68476887544.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/26655880391.pdf
    • https://cdn.shopify.com/s/files/1/0433/8414/4037/files/fosulematagoguvebu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5046/6454/files/xusimibifudufumut.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/70714578704.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/25562490200.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/rilirofiwuvod.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_off000075ed.bin
c7a136fada2022ec82e18cc295de0fefc40e4a54e822bbc440aebdef097debac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75ED 5272 bytes
font_01_sfnt_off00008816.bin
d7cad691aac11bab4acfc8f639a7edb49e6eb3579327e2a69ea3f1825c970f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8816 10016 bytes

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