Malicious PDF — malware analysis report

Static analysis result for SHA-256 43947ed0f871f2fb…

MALICIOUS

PDF

43.2 KB Created: 2020-08-04 20:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94cbd5bbfc8cb24a2faea2aa00fe329b SHA-1: b687b13e2a3bee35e75583a27a467b6a0ed235b0 SHA-256: 43947ed0f871f2fbaef36c6ba3dd3de6c432767b6cf20d272a0e490e2f34cf22
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=textbook+of+electrocardiography+pdf'. Additionally, it exhibits a PDF link farm behavior, with numerous links pointing to Shopify domains, likely for SEO poisoning or to obscure the final malicious destination. The document body, though partially corrupted, contains text related to 'Textbook of electrocardiography pdf' and mentions wkhtmltopdf, suggesting a lure for a document download that ultimately leads to a malicious site.

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.com/pify?keyword=textbook+of+electrocardiography+pdf
    • http://files.jessnicolephotography.com/uploads/1/3/0/8/130874680/9ad9a9832994f.pdf
    • http://files.machinetoolsrebuilt.com/uploads/1/3/0/7/130740158/wimamalataw-danuxexuti.pdf
    • http://files.donorsmatterpdx.org/uploads/1/3/0/8/130874647/ruwugosivas.pdf
    • http://files.daiskyglam.com/uploads/1/3/1/6/131606069/6078879.pdf
    • http://files.retiredmensclub.com/uploads/1/3/1/3/131398143/dowipudiw-sirirebun-domiwiv-sosikegibo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/voximukifidokajokomafuvo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/tegan.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/jixurisufexux.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/89802107305.pdf
    • https://cdn.shopify.com/s/files/1/0434/6164/0358/files/23896781854.pdf
    • https://cdn.shopify.com/s/files/1/0430/1769/9477/files/4334643139.pdf
    • https://cdn.shopify.com/s/files/1/0433/4904/9499/files/84143398923.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/poulan_p3314_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/gakunum.pdf
    • https://cdn.shopify.com/s/files/1/0435/6662/9032/files/19807511421.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/62011391083.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/33574710816.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/71796421942.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_off0000694d.bin
1a6934d4c691216a9fc84d86fed15856a8b09fca526593e6b53c55a1daf8d0d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694D 5560 bytes
font_01_sfnt_off00007c3f.bin
17850cfed168f26c0848977cb32978a4920cd11e7962550302b438e39bc3add5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3F 10536 bytes

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