Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfe5f2287673a5b…

MALICIOUS

PDF

39.0 KB Created: 2020-08-03 16:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43174db3b1776f7b4bdb531d569d6996 SHA-1: dd8228c03de158637cbca327d027b7c1ee2a80e7 SHA-256: abfe5f2287673a5b173201e947c4fb8bdc9c81ceaa991ba823d39e6498a1c17a
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=destination+b2+download+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many hosted on Shopify. The document body, though partially corrupted, contains the same redirector URL, suggesting the primary intent is to drive users to this malicious endpoint. The file's creation by wkhtmltopdf indicates it was likely generated programmatically for this purpose.

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=destination+b2+download+pdf
    • http://files.aaaction.org/uploads/1/3/2/6/132682974/bcf9a.pdf
    • http://files.rebelliousrheaboutique.shop/uploads/1/3/1/4/131406413/2090860.pdf
    • http://files.stavangerfitness.com/uploads/1/3/1/3/131379980/8f793beae2e.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1073/files/buletegaresikidojipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/zafolutonu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1583/8618/files/tetija.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/jupivusekaletak.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/xevurerajivokilirited.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/39671225646.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/19286088060.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/zetadutesema.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/51725344192.pdf
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/vufowufinagu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7955/5486/files/jugezatasuvawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/86433981207.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_off00005a13.bin
7015ffcf5e14929e183e50ed1fc028175d822df2b7bc43ec98da7c4521984047		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A13 5300 bytes
font_01_sfnt_off00006c47.bin
f189b851629e8492236fc82c2e547a53a23cc4fe39df67c11488f166b617e541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C47 10260 bytes

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