Malicious PDF — malware analysis report

Static analysis result for SHA-256 cff8c5e0069d6c07…

MALICIOUS

PDF

50.4 KB Created: 2020-08-17 03:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aac4ecbb12d77cbd057c6b5f79459ca0 SHA-1: be2013eafabd076182fd618842e0edfef6f3b497 SHA-256: cff8c5e0069d6c0782433eac1e675d9df756b480db4f71975bd783cd0794f2e5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=toefl+actual+test+reading+pdf'. This URL is likely part of a phishing or scam campaign designed to redirect users to malicious content. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farms used to improve search engine rankings for malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=toefl+actual+test+reading+pdf
    • http://files.sequoiabrigadecamp.org/uploads/1/3/1/3/131380845/c755054.pdf
    • http://xaxasa.michaelkubisch.com/uploads/1/3/2/7/132740954/8350485.pdf
    • http://files.pamelaplattstudio.com/uploads/1/3/1/3/131380305/saviwazulip.pdf
    • http://files.splendourproject.com/uploads/1/3/1/3/131398286/4796988.pdf
    • http://files.hughstrawn.net/uploads/1/3/0/8/130874672/732288f.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0431/7085/7124/files/makofokodadowazelivabor.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/how_to_draw_a_isometric_drawing_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/wivusekupuvatet.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/ielts_speaking_test_practice.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/goraxivapipozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/46943029190.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/92231782350.pdf
    • https://cdn.shopify.com/s/files/1/0436/1099/6899/files/uncharted_4_ps4_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/54324408940.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/30272939265.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000670c.bin
fd1c6dd3e3964c8162d89acc309f652e2110423e6917d07a52ac72520b86e0e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670C 3080 bytes
font_01_sfnt_off00007228.bin
c2d476e28af83fb3da26602c689274fb95232c7ccd6b41f7501b9a90099ec718		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7228 5272 bytes
font_02_sfnt_off00008423.bin
945c578155826aecfdf955e2e831159f234442c18d0b3957d9bd607fcbc0dc87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8423 10236 bytes
font_03_sfnt_off0000a6de.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DE 16144 bytes

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