Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0344ed2082d285f…

MALICIOUS

PDF

46.5 KB Created: 2020-09-05 07:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ed3a931b86906198d8746dd3e2ebf5a SHA-1: 3e87c25690ec4ee391fcddd1bc20d083f40b9263 SHA-256: e0344ed2082d285f15892a9ac1cee78938fc65029f5f4ee2c73ab635f7df96e5
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 a URL that masquerades as a worksheet answer key. This URL is the primary indicator of malicious intent, likely serving as a lure for further malicious activity. The PDF structure and content, combined with the malicious URL, suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful content.

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.club/wix?keyword=exponential+models+worksheet+answers
    • https://static.usrfiles.com/ugd/4479ed_ea6371f66f224cc296720d58096ac633.pdf
    • https://static.usrfiles.com/ugd/8aba0c_5f023e623d15417a8c9f103a67cf7457.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_a0f6e96b782741e5adf358821ce547c2.pdf
    • https://cdn.shopify.com/s/files/1/0434/6131/2676/files/sejazemelokopesugolo.pdf
    • https://cdn.shopify.com/s/files/1/0448/8026/5383/files/sheetz_store_628.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/pexatozelozarifaxolago.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/66879918422.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/53313564391.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8340/files/exercices_algorithme_les_boucles.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2055/files/46464133452.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzawubemamomavokam.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/42767898017.pdf
    • https://cdn.shopify.com/s/files/1/0432/9606/3652/files/489125347.pdf
    • https://cdn.shopify.com/s/files/1/0462/1795/3433/files/online_passport_form_ireland.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/
    • https://cdn.shopify.com/s/files/1/0430/901

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076eb.bin
36e8ddcaeab79e4f2882d04898f1355c2460ef0dd162765202901d8cea4c3b36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EB 5380 bytes
font_01_sfnt_off00008921.bin
1d61c8a23ed33658b7455ac71b8a25e551f3a0f576b03a867f1c040d29f83369		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8921 10424 bytes

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