Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9105400639111e…

MALICIOUS

PDF

50.0 KB Created: 2020-07-31 06:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d46f722682dc9092c4b93fcf5197841 SHA-1: ca4142f90abe4c10b1fd8adc6fe01668e1a98375 SHA-256: 3a9105400639111e69499f0ed83798a2656decdca01caa9919fb03283a1aac95
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links designed to redirect users to a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary redirector URL, ttraff.ru, is flagged as malicious. The document body, though heavily obfuscated, appears to contain keywords related to the lure. The presence of numerous external PDF links suggests an attempt to distribute further malicious content or engage in SEO poisoning.

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=lp+penyakit+pneumonia+pdf
    • http://files.lashesbymatick.com/uploads/1/3/2/6/132695438/8415044.pdf
    • http://files.pdixonphotography.com/uploads/1/3/1/4/131453982/2909883.pdf
    • http://files.dumbingdownamerica.net/uploads/1/3/1/1/131164452/aed6a930afab7.pdf
    • http://files.attitudedancecompany.com/uploads/1/3/0/7/130775392/gopizafudedem.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/91190336352.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8448/files/tesatawuxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9735/files/92643335744.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/guliw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15906675896.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6250/files/91662155103.pdf
    • https://cdn.shopify.com/s/files/1/0434/8752/7078/files/88624555324.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/27256900445.pdf
    • https://cdn.shopify.com/s/files/1/0431/9785/7954/files/tawexiwujerakag.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8565/files/14642388207.pdf
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/buxexukilan.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/
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008022.bin
2e3af33663d03ec9a00a2230504bb9e8f98e67bd55fe1d0bcc4ef3f4c4b957b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8022 1696 bytes
font_01_sfnt_off0000884d.bin
19565165e905e9ba012729dd06387f63c65b87dc7a7bf64d8ab13872a4882298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884D 4872 bytes
font_02_sfnt_off000098d8.bin
9c87a22ab7b0520ae4392d0feb826c17b8396802ca6deed26cc516c77e625917		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98D8 9948 bytes

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