Malicious PDF — malware analysis report

Static analysis result for SHA-256 1afc9afa40ecf002…

MALICIOUS

PDF

44.2 KB Created: 2020-08-27 17:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76bfab63d6c4de61c4fe5a4b22a418e5 SHA-1: e51e7d553baeff29d0f231ea04ace1b4b40acb6e SHA-256: 1afc9afa40ecf00206edda3b437f4669128b3bae4cda28123da4ddaee7f8fbb4
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 malicious infrastructure. The document body, though partially corrupted, contains text suggesting a lure related to a 'D d scholar s pack' and includes the malicious URL. The presence of numerous external PDF links, as flagged by PDF_SEO_LINK_FARM, further supports the malicious intent of redirecting users. The primary malicious IOC is the redirector URL.

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=d+d+scholar+s+pack
    • http://files.defenceoslo.org/uploads/1/3/1/4/131408581/3938504.pdf
    • http://files.deloreanguide.com/uploads/1/3/2/6/132681596/5884444.pdf
    • http://files.mrpsocialstudies.com/uploads/1/3/2/6/132696112/3623965.pdf
    • http://files.alexbaecher.com/uploads/1/3/2/7/132740763/gidip_tuvekajonotagor_vekurosifo_koxejowula.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9561/files/zumutudotud.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/444523203.pdf
    • https://cdn.shopify.com/s/files/1/0429/4053/0854/files/70379232736.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/54277330936.pdf
    • https://cdn.shopify.com/s/files/1/0436/8665/8213/files/16956132743.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/pdf_candy_pro_key.pdf
    • https://cdn.shopify.com/s/files/1/0444/5673/8983/files/vujogadajabudi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/nowigifosifovesurolibipip.pdf
    • https://cdn.shopify.com/s/files/1/0434/2638/1975/files/19247240638.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_off00006340.bin
bfed194a853e5185b8219e64486266a750ed709110f4735417eae448efa05764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 4660 bytes
font_01_sfnt_off00007318.bin
2d3282c3e5fb347c02efea23be7a7589ff4268e0f6daf6675595e333fe9b7c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7318 10320 bytes
font_02_sfnt_off0000964a.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x964A 4324 bytes

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