Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e15390798a13bcd…

MALICIOUS

PDF

48.3 KB Created: 2020-07-28 07:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c123fdf72e5428f26432b05abc114ac0 SHA-1: 540e71c160794ac499a50678349cf93c1c63d394 SHA-256: 1e15390798a13bcd21714a3d98841f823c99fdf23c3bc9882e2ee4c407996b6d
150 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external PDF files, with one URL identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to redirect users to harmful content. The ML classifier also flagged this PDF with high confidence. The document body contains obfuscated text that appears to be related to the 'osrs bolt tips guide' keyword found in the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=osrs+bolt+tips+guide
    • http://files.lindalebaptistchurch.com/uploads/1/3/0/9/130969003/vokalatabujovogul.pdf
    • http://files.vapee-scapeks.com/uploads/1/3/1/6/131606603/rakewew_totupimajaf_dorumuxezolemiv_gavejuvepol.pdf
    • http://files.everlastinglovechurch.org/uploads/1/3/0/8/130874043/rusejoxijiwu_pexegujijagid.pdf
    • http://files.saffrongarden.org/uploads/1/3/2/7/132740694/7558054.pdf
    • http://files.grownfolkmotto.com/uploads/1/3/0/7/130738919/94ca3.pdf
    • http://files.lindalebaptistchur
    • https://cdn.shopify.com/s/files/1/0429/2696/4895/files/60610550514.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/pulubefuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0278/1083/files/83453424659.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/dikedirojokaranarufuki.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/36815510394.pdf
    • https://cdn.shopify.com/s/files/1/0437/9135/1969/files/35923289743.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xatet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/44335027570.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/4013009862.pdf
    • https://cdn.shopify.com/s/files/1/0437/2666/7925/files/11036893398.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/medapag.pdf
    • https://cdn.shopify.com/s/files/1/0433/5173/6471/files/14090806649.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_off000074df.bin
c636ce08b475df05cd25d8c36e55c9e1a13dea82e925b7cb1ae3013eae18eef3
pdf-font-stream PDF embedded font (sfnt) at offset 0x74DF 4860 bytes
font_01_sfnt_off0000856c.bin
1ac56f6e7d097a27a7e14b90961e0aec432a7db2d98780f0099de1fa0fac6baa
pdf-font-stream PDF embedded font (sfnt) at offset 0x856C 2420 bytes
font_02_sfnt_off00008f0f.bin
d14e9edebb579551c3178ac26c7519ed1780167a1d90775f848a25d51c599882
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 10780 bytes