Malicious PDF — malware analysis report

Static analysis result for SHA-256 4db28eef39e605c8…

MALICIOUS

PDF

58.7 KB Created: 2020-08-22 06:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b787963722cf07a78d260e002912ac7 SHA-1: dae9dc6ac56a8f9ba4f6f2a0325a78ad4f358e49 SHA-256: 4db28eef39e605c8eace9863c0bad97b62b9a49b8f30c211a5001d573987965c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=vba+set+date+time+format', which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of a link farm suggests an attempt to broaden the reach of the malicious infrastructure.

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=vba+set+date+time+format
    • http://files.lifeharmonywellness.com/uploads/1/3/0/8/130874451/7099995.pdf
    • https://cdn.shopify.com/s/files/1/0439/8976/2206/files/42841727134.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3508/files/dizijineguzuxuvepumomure.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/tovinulepaxakudemi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1863/9765/files/zijogemomebetukovoka.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/vewuver.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viloronijiletamuzolodoxe.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/malaxezodisalewugevexomux.pdf
    • https://cdn.shopify.com/s/files/1/0439/1242/9723/files/xuxoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/decameron_boccaccio_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/34457482546.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/78164427560.pdf
    • https://cdn.shopify.com/s/files/1/0432/2322/0392/files/fudiwutukariro.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_off0000a99d.bin
30d0990e1efe3dc695b939c418228d1feeeca817900e6791f075fa2f4d0d7ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA99D 5124 bytes
font_01_sfnt_off0000baf3.bin
fe7ccfec12fbd415ac03fcdd6062c53f2e7148a55a33c1dd7bacf186efb5d336		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF3 10308 bytes

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