Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96cef4be514a3fb…

MALICIOUS

PDF

52.1 KB Created: 2020-08-10 07:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57fe22d953479bf9feedcd13e4614e24 SHA-1: db67d9672e5988955eabf367bed8b0ce9066b693 SHA-256: b96cef4be514a3fbc0b019d3be09640eada044f9acf695ef72340611c815b9ee
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=bharathiar+university+mba+syllabus+2020+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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/pify?keyword=bharathiar+university+mba+syllabus+2020+pdf
    • http://files.unicorngrief.com/uploads/1/3/1/3/131383953/116342.pdf
    • http://files.amberharp.com/uploads/1/3/1/3/131380158/watoduwobiluwipon.pdf
    • http://files.opendoorassemblymarshall.com/uploads/1/3/0/8/130813516/355121.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5391/files/pulesurabejefotukafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vukanuzedatijaxugevune.pdf
    • https://cdn.shopify.com/s/files/1/0430/8733/1481/files/atrahasis_testo_completo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4871/3896/files/womuravenudisigeroberibi.pdf
    • https://cdn.shopify.com/s/files/1/0436/8665/8213/files/88546028425.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/australopithecus_caracteristicas_fisicas.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0966/files/taxonomic_classification_of_animals.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/58188966973.pdf
    • https://cdn.shopify.com/s/files/1/0435/1092/3423/files/66211743655.pdf
    • https://cdn.shopify.com/s/files/1/0447/8841/6669/files/motorola_n136_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/lg_backup_app.pdf
    • https://cdn.shopify.com/s/files/1/0434/8300/5078/files/4607045066.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/safixisebuserodubejafe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065fc.bin
e0e967bf0b8694eef9da15a5f20b54925b052ba7bf5e499e03b12b47e6ddb31a
pdf-font-stream PDF embedded font (sfnt) at offset 0x65FC 5908 bytes
font_01_sfnt_off000079ef.bin
56c38b48895f5fc1a97d2e418196d3e75eee3ecd5fdde8c63b6f00045846bdd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x79EF 9732 bytes
font_02_sfnt_off00009320.bin
cd233af9723df8a2a37106f43091ef3c01cdd736b7ffd76c9857b005fd8d9d73
pdf-font-stream PDF embedded font (sfnt) at offset 0x9320 15308 bytes