Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb6b24d05e88e74…

MALICIOUS

PDF

50.7 KB Created: 2020-08-19 13:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffb7e29bb3dd923b29d4ad17e3609aab SHA-1: 95f1779b1d2a9cb5419f78dd0f2862cfa3476186 SHA-256: aeb6b24d05e88e74193c1dab9d8dd497c2ee5508838cd5fc073c1e265cbb2950
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that suggests an invoice or payment lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=if+function+excel+timesheet
    • http://files.schillingmediainc.com/uploads/1/3/1/4/131406075/8051944.pdf
    • http://files.cambodianharvest.org/uploads/1/3/1/3/131379894/8988722.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/lewatisebemepitarafidi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7757/3535/files/23340144438.pdf
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/60349991236.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64255738852.pdf
    • https://cdn.shopify.com/s/files/1/0434/1553/5774/files/58096928579.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/kowabadewij.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/15178450343.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/vexelobezaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/9183/5546/files/nawojo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2401/5783/files/beers_criteria_2020_list_of_medications.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3751/files/letter_of_recommendation_from_professor_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8309/files/57986102447.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_off00008a42.bin
1bd4cbbef1de224ad70204804afa83a926479f74be4e9c951d43141531fb8828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A42 4820 bytes
font_01_sfnt_off00009a84.bin
478f3395b299a2220292d0dd4639a784c4201d1d4c0ab57640c895bae24c971d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A84 10472 bytes

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