Malicious PDF — malware analysis report

Static analysis result for SHA-256 352f37e7a33270a5…

MALICIOUS

PDF

38.0 KB Created: 2020-07-15 11:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98b75f5c08d680d435cfbc329ef11db9 SHA-1: 466ba3d056b16acc962e304eff1e3a56c3e034ac SHA-256: 352f37e7a33270a537b5a5c9e69e2cf90a0120a9903baa761f70202a51649411
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to external resources, a technique often used to obscure malicious intent or to create a link farm for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.com), suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains keywords related to downloading PDFs, reinforcing the lure.

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/wb?keyword=animal%20physiology%20hill%20pdf%20download
    • http://files.lhsmediacenter.com/uploads/1/3/1/1/131164440/aac60f69.pdf
    • http://files.legallyours.org/uploads/1/3/0/7/130775834/siwozep.pdf
    • http://files.dynamicwellnesstherapy.com/uploads/1/3/1/8/131871414/6999769.pdf
    • http://files.impulsestudioboutique.com/uploads/1/3/1/3/131380687/palalasakoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/pigosabi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/nuwulipekeki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://vijugogazoxo.files.wordpress.com/2020/07/vomakovedutopudirirawasa.pdf
    • https://xakemidutugu.files.wordpress.com/2020/07/81437071188.pdf
    • https://vexopebugu.files.wordpress.com/2020/06/bagajowogun.pdf
    • https://xosatige.files.wordpress.com/2020/07/8213373091.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/derimoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/jebabin.pdf
    • https://cdn.shopify.com/s/files/1/0428/7086/6087/files/xisizedabapejik.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/9538458696.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/37061382529.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesuwalaloluxafim.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/zesuvelefebepopa.pdf
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/69850641854.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_off00005a22.bin
c0a200b38f03c9ca74e0304be5c61fd8259f04e2247bd80ad27e5a6a438e0f75
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A22 5132 bytes
font_01_sfnt_off00006b6a.bin
62a2c584cad92e205483e1dd6cb7352212a17eb5f5d2809de5b3a5c13e1ae025
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6A 9060 bytes