Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f25e9395d700b1…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 16:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fd79ebcd078bafd72f1372086d0c645 SHA-1: 320d1366de4a7dfcc0a7c9702d059ee2b02605f9 SHA-256: a3f25e9395d700b183b42552390fa608be81c92e331544176855785f8d52771c
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a workbook, and the primary malicious URL is also present within the document body. The heuristic firings indicate the PDF is designed as a link farm and a redirector, likely to lead users to malicious content.

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=marshall+cavendish+science+matters+workbook+answers
    • http://jopevip.wolfpackbands.org/uploads/1/3/0/8/130813821/4829212.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/gate_fold_brochure_template_microsoft_publisher.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/4469544187.pdf
    • https://cdn.shopify.com/s/files/1/0434/3988/2402/files/beasts_of_no_nation_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0282/files/kimigegikoxatanunitaxaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/bleak_house_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/4366/7616/files/tokafarazumidugikanalujug.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7818/files/arch_linux_fonts.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/79878294833.pdf
    • https://cdn.shopify.com/s/files/1/0437/0920/2597/files/43809786076.pdf
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/mumitinatakemerelivex.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7599/files/rebivas.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/87471806153.pdf
    • https://cdn.shopify.com/s/files/1/0440/8305/2696/files/41792624016.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005144.bin
41a70232fb63b6722795b224571947943ca524118a3226acaf0ce31b96ecafd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5144 5328 bytes
font_01_sfnt_off0000633f.bin
6ca5d994ca0db4c9149aafad7b9e3c952e6f4d57a5b42a679e1c6ed31db35ecd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633F 9104 bytes
font_02_sfnt_off0000825c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825C 4324 bytes

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