Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcc4d2fd4113897…

MALICIOUS

PDF

51.2 KB Created: 2020-07-24 07:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74cb6ba5ca6ad4cb5eb61d79289ca05f SHA-1: 4dab00042313c03a4b0f528365ebf394c76433ff SHA-256: 1fcc4d2fd4113897c2de7654ee49b1bc14e4c183d3a5f44a7edcdabb313b4138
120 Risk Score

Malware Insights

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

The PDF file, disguised as a 'Voting rights timeline worksheet', contains numerous embedded links. One of these links, 'https://ttraff.ru/wb?keyword=voting%20rights%20timeline%20worksheet', points to a known malicious redirector. The file also exhibits characteristics of a PDF SEO link farm, with 17 generated external PDF links, many hosted on cdn.shopify.com. This suggests a campaign to distribute malicious content through SEO-optimized PDFs.

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/wb?keyword=voting%20rights%20timeline%20worksheet
    • http://files.avicraftwool.com/uploads/1/3/0/7/130775712/2f68c09d.pdf
    • http://files.canadoretv.com/uploads/1/3/0/9/130969446/5290b.pdf
    • http://files.wayashealingpath.com/uploads/1/3/1/8/131856012/gemolafukotezevo.pdf
    • http://files.myececlass-safety.com/uploads/1/3/2/6/132695200/9656613a.pdf
    • http://files.avicraftwool.com/uplo
    • https://cdn.shopify.com/s/files/1/0429/8211/3433/files/lubesigosaravejisaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8656/7841/files/molasariwisezuvakeleroli.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/fijij.pdf
    • https://cdn.shopify.com/s/files/1/0435/9802/0767/files/85477027000.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/89599584829.pdf
    • https://cdn.shopify.com/s/files/1/0430/0265/8979/files/71730560195.pdf
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/wefedebapebeso.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/jogixusamewetirise.pdf
    • https://cdn.shopify.com/s/files/1/0433/7215/0947/files/34881575658.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/jinuwekebuganerina.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/fakudijabasomogijav.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/femaferimezarezisazol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.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_off00008cbf.bin
bc1d797772dd5a3dc1fd860c28363726e27efc63d2324d901b55956388fe0ac7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CBF 4800 bytes
font_01_sfnt_off00009cec.bin
51e647fc0f203e73bb65fe0e2d393eab8f2198fb62f03822b38437c4cb95ede8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CEC 10048 bytes

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