Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70467b869c0d3a0…

MALICIOUS

PDF

34.5 KB Created: 2020-08-15 05:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75f6e9b41d8477d89985a5c7f415295c SHA-1: 57a06d1e3c4ab9bd9592a0ebcd7959db0741c390 SHA-256: e70467b869c0d3a02fb1a232dffd42269b130fbe315c59688546ac185b72b144
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a link farm designed to mimic search results, specifically for "jolly phonics workbooks books 1 7 pdf". The primary malicious link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains the malicious URL and several other PDF links, suggesting a SEO poisoning or link farm attack. No scripts were extracted, but the presence of multiple links and a malicious redirector indicates a phishing or redirection attempt.

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=jolly%20phonics%20workbooks%20books%201%207%20pdf
    • http://gusenatun.elirakuka.com/uploads/1/3/1/3/131379732/jegon.pdf
    • http://fidirote.snowflakeshuffle.com/uploads/1/3/1/6/131636825/wipabusabir.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/kokonunawasumewubo.pdf
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/importance_of_sociological_imagination.pdf
    • https://cdn.shopify.com/s/files/1/0437/5438/9665/files/fivewatilana.pdf
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/bottleneck_blues_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/serena_bloodfeather_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/cetosis_ruminal.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/25735709953.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/wexiletifusope.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/30949133717.pdf
    • https://cdn.shopify.com/s/files/1/0431/5561/9994/files/cirrosis_hepatica_compensada_y_descompensada.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_off0000489f.bin
c0c39debb5aa694929284400d1c30d9a60c5fdc49ef70df9ae21d3cdd0aace5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x489F 5552 bytes
font_01_sfnt_off00005b8e.bin
1ea000c9417f1ec0a27a1eb53a1c701cbce6b4d0c120a4dddddef858c2efe604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8E 10172 bytes

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