Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0c45091ec23217…

MALICIOUS

PDF

55.1 KB Created: 2020-08-07 18:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98ab25f012fe5b2f52c6627dca473eab SHA-1: de8ebef8ea607fda409e73a7de6ab14cb18fa8af SHA-256: da0c45091ec232176976ccb041a6b76f1170ac1a274be4f9c335f3bc1d38d297
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector. The document body text, though partially corrupted, suggests a lure related to downloading free books. The presence of a call-to-action button further supports a phishing or malicious download attempt. The file is likely part of a link farm or SEO poisoning campaign to drive traffic to malicious sites.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=psychology+books+in+telugu+pdf+free+download
    • http://files.brisbanetapstoiletsanddrains.com/uploads/1/3/0/9/130969298/66e129b28.pdf
    • http://nubosigo.amariejphotography.com/uploads/1/3/1/4/131453177/484416d7ed6c18.pdf
    • http://files.theevillageapothecary.com/uploads/1/3/0/8/130874050/6193403.pdf
    • http://jejabovik.mirembegirlsvocationalcentre.com/uploads/1/3/1/0/131070450/zubapowiramivo_nawurogirekam_vuwemiwiwebelak_pekilogidanezi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/xifosikalulip.pdf
    • https://cdn.shopify.com/s/files/1/0429/7362/6524/files/janavirewezelofi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/sidetelox.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/86596034350.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/77570706862.pdf
    • https://cdn.shopify.com/s/files/1/0437/4927/7845/files/nemufokaruge.pdf
    • https://cdn.shopify.com/s/files/1/0434/7786/0516/files/gulaxudelunibuxonum.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/2482674842.pdf
    • https://cdn.shopify.com/s/files/1/0427/8249/0791/files/kimutobexurojinerit.pdf
    • https://cdn.shopify.com/s/files/1/0436/8039/9513/files/jodibetokokuvasidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/poxefunutonobawebowo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7033/8725/files/miputawixobegevexebosob.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/deductive_reasoning.pdf
    • https://cdn.shopify.com/s/files/1/0430/9408/1687/files/69038422547.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_off0000867b.bin
5c0fc4a7be63f57b7bfc7bea274b5afd72e1b5c41fc384a2b81a3f002ecf7afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x867B 5816 bytes
font_01_sfnt_off00009a53.bin
6f20dd902382d2eb06ea0b114391faab9daf93e1c95b3daaa89e7971b899445a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A53 4312 bytes
font_02_sfnt_off0000aa64.bin
9f40701107494051413a41abb2613ea83837112c002d8aabc1a9eea6e9d02dff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA64 10788 bytes

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