Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf17b2b48c39eae…

MALICIOUS

PDF

39.9 KB Created: 2020-08-02 23:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a18563711caaf8d87f1f6e14573b04a0 SHA-1: 97ffe2abc89ca5722c281f5f3a607696457acc82 SHA-256: 9cf17b2b48c39eae420804544e66c1b5e720c9a17e8d619c179b64352387e2d8
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm or redirection attack. The primary malicious URL identified is https://ttraff.cc/pify?keyword=auto+increment+sql, which is likely used to redirect users to further malicious content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=auto+increment+sql
    • http://files.vanessahopecoaching.com/uploads/1/3/0/7/130738531/bfbdea.pdf
    • http://files.spokanedrumlessons.com/uploads/1/3/1/4/131407138/6a8b924ae7.pdf
    • http://files.twinsrun.com/uploads/1/3/1/6/131606260/nudopokatexopem-gesanizile-jikobub-vikojamuwo.pdf
    • http://files.lknailsandbeauty.co.uk/uploads/1/3/1/4/131454916/rawuramofopefelexux.pdf
    • http://files.bearsdenmartialarts.org/uploads/1/3/2/7/132740905/xakanumex.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5574/files/82979095382.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/85483270212.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/fotifivuwafid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdf
    • https://cdn.shopify.com/s/files/1/0432/1021/1491/files/unity_text_color.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/jitebowonomoguxikibo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3507/3440/files/55640734417.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/33298064453.pdf
    • https://cdn.shopify.com/s/files/1/0431/7731/2405/files/82234741602.pdf
    • https://cdn.shopify.com/s/files/1/0433/0323/9840/files/clinical_laboratory_hematology_mckenzie_3rd_edition.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_off00005f23.bin
115db5564bf1974857f404e48a3285ab00982152bec2596602725487b9b253b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F23 4852 bytes
font_01_sfnt_off00006f90.bin
2d88f8677ffdceb194c8baaa8c79328b17e8e460f337079abd10fd9c4abd33fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F90 10436 bytes

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