Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29b0e06f3a99114…

MALICIOUS

PDF

41.9 KB Created: 2020-08-09 18:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a8d5acaf28b02487fe78e59bfdb6aff SHA-1: f1248e813113a754119e58048e2300698ead4fb0 SHA-256: e29b0e06f3a99114b0f3fcf645658ba6bd5a04b592a722d2a245dee0b4f065c7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL 'https://ttraff.ru/pify?keyword=basic+brazilian+portuguese+phrases+pdf' leads to malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external PDF links, with 'https://cdn.shopify.com/s/files/1/0432/9019/8180/files/6188303706.pdf' being the first identified. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure.

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.ru/pify?keyword=basic+brazilian+portuguese+phrases+pdf
    • http://files.wundanookcreations.com/uploads/1/3/1/0/131070192/nasowaneromibefaxewo.pdf
    • http://files.psychchange.org/uploads/1/3/1/8/131856636/5836330.pdf
    • http://files.atlastrekshop.com/uploads/1/3/1/0/131071117/wukotosiz_wusuvabunozise.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/6188303706.pdf
    • https://cdn.shopify.com/s/files/1/0447/8880/9879/files/apsc_new_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/tunutetejomes.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/jedefagamugisom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gegexovikorojirokelaxedu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/29878061118.pdf
    • https://cdn.shopify.com/s/files/1/0433/2489/9496/files/bifivot.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/28594228319.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/19321440854.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/56707041612.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7736/files/formularz_ceidg_1.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/lokubovorusowex.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_off0000641c.bin
268bac6dc68f2ebdd364bed3174a4ef6e9f4c18d4f14f3aaacdb6c45ae75e676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 5656 bytes
font_01_sfnt_off00007754.bin
bef8a6d7c9423f4915554c732beb775724e55195c1ce26a1f255c9fddd61e751		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7754 10368 bytes

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