Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3824e7fd73ea3b…

MALICIOUS

PDF

47.4 KB Created: 2020-08-21 22:19:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 720f9455015bedde21e0941791a699f7 SHA-1: 43efda02fc7bc4bf69066d0644bc20cd2cb76b2d SHA-256: 4b3824e7fd73ea3b44f2cc1d48ab98f90a4bba5364793556df0fcd3503240e59
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, the PDF_SEO_LINK_FARM heuristic suggests the document is part of a link farm, likely to improve search engine ranking for malicious content. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious sites. No scripts were extracted, and the document body is heavily obfuscated.

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=geometric+mean+worksheet+answers+8-+1
    • http://zejulusig.levelonemarket.com/uploads/1/3/0/7/130776031/5f5d0172c.pdf
    • http://files.spiralpathpilgrimages.com/uploads/1/3/1/3/131384718/mojogazotiv.pdf
    • https://cdn.shopify.com/s/files/1/0444/3032/7975/files/importancia_de_los_agentes_economicos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0971/9965/files/42036455236.pdf
    • https://cdn.shopify.com/s/files/1/0437/9013/9549/files/2766958588.pdf
    • https://cdn.shopify.com/s/files/1/0437/1909/8523/files/bookmark_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/getting_things_done_2015.pdf
    • https://cdn.shopify.com/s/files/1/0437/1123/4199/files/accident_and_emergency_radiology_a_survival_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/75069143311.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/wakukaronezufavun.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_off0000614b.bin
7acbdff2c9d05aeba02f83121c62b510b5ebcbe82a30f85bb7e43cb693a1b3cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 5472 bytes
font_01_sfnt_off000073df.bin
89bd3b520f68a065d87ca519e55720b5aa23482a7d57b733ef6db1f1d80f2e75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DF 11316 bytes
font_02_sfnt_off00009a73.bin
3da9309f7c28e01a20d15285b754fad9116e6eb7744d168a0fff2950d6122081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A73 16072 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.