Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0e20bc9ce596b9…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 22:13:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06d22ad9876eaa1546228be8268225ef SHA-1: c50a9c2bfa6d13f895c3757da71a6b40c885bb02 SHA-256: cd0e20bc9ce596b94feff3d59ee885a316a3d20c6ee9f21f0ffefbc6e464d59d
150 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.com/wix?keyword=enunciation+exercises+for+actors+pdf'. The document body also contains this URL, suggesting a lure to a malicious site. The PDF also contains a large number of embedded links to Shopify, indicating a link farm, likely for SEO manipulation to drive traffic to the malicious redirector.

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/wix?keyword=enunciation+exercises+for+actors+pdf
    • https://cdn.shopify.com/s/files/1/0429/2316/3801/files/fasidegofaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/vemenowumafekejab.pdf
    • https://cdn.shopify.com/s/files/1/0436/4507/5609/files/ielts_speaking_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5711/files/96282098532.pdf
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/61251965609.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/74799617858.pdf
    • https://cdn.shopify.com/s/files/1/0428/6483/6764/files/inventory_list_with_photos_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/fewuxipunotinimug.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/19674323929.pdf
    • https://cdn.shopify.com/s/files/1/0431/8009/7687/files/adding_and_subtracting_decimals_worksheets_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0431/3455/0173/files/kitorotar.pdf
    • https://static.usrfiles.com/ugd/a2e20a_94d3793ab25145609dc1adf44a9a862c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddc6350cfacd4fc08bc876b368e240d2.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_f6e9e13f93464dffa46a406dca8f5d01.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd22ab00b0ce4bc5ba212b6143eff598.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_off000067be.bin
a4d2ea4a0c070b1aac3ccf625b820b523bf3d98e32cb3362bddf72b4b9fbf283		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 5144 bytes
font_01_sfnt_off00007958.bin
794f4d90ce9d655bc969ec3ada4ce83a4683322b2c0ae1b0af01e896eae87204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7958 10304 bytes

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