Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0bf6d54e9e9b9e…

MALICIOUS

PDF

32.0 KB Created: 2020-08-15 06:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dd3709f1a83830a0bd03256ce1703ea SHA-1: 729d87d25101aad48377811695108191ac179374 SHA-256: ea0bf6d54e9e9b9e07ba42f5a06e4fd1b9d8e63fdd5a37a9445ea4d3fa0b6a22
140 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure for a 'Grainger catalog download pdf'. The presence of numerous external PDF links also indicates a link farm strategy. The primary malicious IOC is the redirector URL.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=grainger%20catalog%20download%20pdf
    • http://luvol.midwesternsales.com/uploads/1/3/0/8/130874222/26ae91.pdf
    • https://cdn.shopify.com/s/files/1/0428/2200/8988/files/shrm-_cp_exam_secrets_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/3717/7494/files/aprendizajes_clave_secundaria_ciencias.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36726725464.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/dovogajodazetupuridapit.pdf
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/kometimopoxesoriruga.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7099/files/wujesebitujedasal.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4130/files/analog_and_digital_sound.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/85626723715.pdf
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/kibabiviwupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/58128810967.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6509/files/25086320260.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_off0000414f.bin
cfd7a318b2270e4531ea94b402811a4b62ce6f3734690b79fa3e292229cc88ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x414F 5268 bytes
font_01_sfnt_off0000535d.bin
a01e6c6d498af255a7d3a4b3cfd9f85ede89a60355c54df373b8d5b4b9c06977		 pdf-font-stream PDF embedded font (sfnt) at offset 0x535D 9408 bytes

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