Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1dc8e59cdc92bb…

MALICIOUS

PDF

44.7 KB Created: 2020-07-29 00:53:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 640feb1610cfc725770d4249239d2d2b SHA-1: d40ef33c1de81f7e1de4efaf276754d4e525aeba SHA-256: 4a1dc8e59cdc92bb97ec6c1c7ee41168d1db24db95608cdc20b7d106935703cb
120 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm for distributing malicious content. The primary malicious URL identified is https://ttraff.cc/pify?keyword=mixed+present+tenses+exercises+intermediate+pdf. While no scripts were extracted, the structure and heuristics strongly indicate a phishing or malware delivery 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.cc/pify?keyword=mixed+present+tenses+exercises+intermediate+pdf
    • http://files.philip-mckibbin.com/uploads/1/3/1/4/131407029/f5da3d54034.pdf
    • http://files.lifeofastreetdog.com/uploads/1/3/0/7/130740011/8496827.pdf
    • http://files.theroute92.com/uploads/1/3/0/8/130873973/zuguxizamuri.pdf
    • http://files.mpowertheworld.net/uploads/1/3/2/7/132740415/kadisetiwebuget_rofajanagojata.pdf
    • http://files.bodiicore.com/uploads/1/3/1/1/131163896/reveniwagosifer_bumivajuxego_xofeporegujav.pdf
    • http://files.mpowertheworld.net/uploads/1/3/2/7/1327
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/10886362646.pdf
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/40964755822.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/82034818027.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/33399623787.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/1448698275.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/bupele.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/55646344847.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/48608693925.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/varizibusuxojam.pdf
    • https://cdn.shopify.com/s/files/1/0432/2328/5920/files/waximaturesuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dojezurin.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_off0000703f.bin
59b41f5a60b96ec8cc3fa729df08077a9b2ee6ac25208820826dd6828d85d67c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703F 5020 bytes
font_01_sfnt_off0000813b.bin
6308eeaca774af037cf1a22a89b8cc7a9e203e80e40df9e06a5734582fca9ef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x813B 10572 bytes

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