Malicious PDF — malware analysis report

Static analysis result for SHA-256 221be0dca6b1f833…

MALICIOUS

PDF

50.5 KB Created: 2020-08-31 15:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 537b81f9433ff8b4accc3e0211a1d9c4 SHA-1: 2583d58bb36c7d0e361ff1a2a4c3fe4b563b78d6 SHA-256: 221be0dca6b1f8338ba30b2c6167a24315f2f54117ab6096873e43d4048b5056
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=video+player+all+format+apk+mirror'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, one of which is 'https://static.usrfiles.com/ugd/1a89c8_fe4a26a6220942fc9efdfb8540b80887.pdf'. The presence of a 'download button' lure further supports the malicious intent of directing users to external, potentially harmful content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=video+player+all+format+apk+mirror
    • https://static.usrfiles.com/ugd/1a89c8_fe4a26a6220942fc9efdfb8540b80887.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_4808d374946e471eba91498fcc81b1ad.pdf
    • https://static.usrfiles.com/ugd/76de1a_ac450ecc984d469e8852264694473ffb.pdf
    • https://static.usrfiles.com/ugd/7c3584_09a279885ee54a279d644da2b989bafa.pdf
    • https://static.usrfiles.com/ugd/1e32c2_21c592b6340a4004870de1d11eb1aee0.pdf
    • https://static.usrfiles.com/ugd/c3548c_26789274dc874a6fabee9241cdc70eba.pdf
    • https://static.usrfiles.com/ugd/b8c837_841970b253014081974b0b7abd077333.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/dumatidusuwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/22568600313.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/mujibofinejipijazoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/4093/9933/files/84915341337.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/exercices_avec_avoir_et_etre_au_present.pdf
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/smiley_central_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/94502108165.pdf
    • https://cdn.shopify.com/s/files/1/0434/9761/9621/files/93902391421.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005af4.bin
95b2ee74482da27ed5ad281f18572352f1d6cde4bd4fe5dfc5f81a5a035a6ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF4 4824 bytes
font_01_sfnt_off00006b5e.bin
f06c6e914f97ace2d21870ffdb8560e87b595c6aa39cec9b77639ff78903de20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5E 1964 bytes
font_02_sfnt_off000074b7.bin
cfb2a02938b40c629114d55c7938609a43544ef82895435d012a4953a55e1d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B7 10864 bytes
font_03_sfnt_off000099c2.bin
313c3940a6f4aae92ceaa1b1a843de6e6f13411355a457aba6e018c383fce54c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C2 16060 bytes
font_04_sfnt_off0000ae57.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE57 4324 bytes

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