Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c03619c598a36b…

MALICIOUS

PDF

43.2 KB Created: 2020-08-04 16:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9922c3413938589b36a436044bcbf01c SHA-1: 465b6fc1c40da2dc5f0c3e71a5e87c419ba7b5ac SHA-256: b8c03619c598a36ba8a76d40606c25ba6efc919a9d9683ea999c7c86e1d4471c
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. Crucially, one embedded URL, 'https://ttraff.cc/pify?keyword=alexander+hamilton+book+ron+chernow+pdf', is identified as a malicious redirector. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution, disguised as a book download.

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.cc/pify?keyword=alexander+hamilton+book+ron+chernow+pdf
    • http://files.churchvsports.org/uploads/1/3/1/4/131437932/3145738.pdf
    • http://files.newlightfotodesign.com/uploads/1/3/0/8/130813111/7154933.pdf
    • http://files.bulldogsread.com.au/uploads/1/3/1/4/131438046/wasez.pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/zaxezenigoti.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/mesuleselulazapumolupan.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/juwikirovajadeloxos.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/50255360092.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/98535965157.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/95044293653.pdf
    • https://cdn.shopify.com/s/files/1/0430/6635/9962/files/45718507044.pdf
    • https://cdn.shopify.com/s/files/1/0434/1484/7655/files/libro_catecismo_para_nios.pdf
    • https://cdn.shopify.com/s/files/1/0435/0279/6964/files/intermediate_algebra_bittinger.pdf
    • https://cdn.shopify.com/s/files/1/0430/7723/8945/files/ts-_2000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/4169/9478/files/94490530776.pdf
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/sogapadape.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_off00006a21.bin
cd5cae52e4dfdbd1735cddcb2e9821c59d48338e5db29ad10a13c5d2355ccedc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A21 5568 bytes
font_01_sfnt_off00007cfe.bin
870060687cd47856de499743c9466ec9ea127b31afd4f67bc257256625f7414b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFE 10228 bytes

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