Malicious PDF — malware analysis report

Static analysis result for SHA-256 559d1c4ed6169d83…

MALICIOUS

PDF

55.4 KB Created: 2020-08-22 20:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efef385029e5b0bf560949154befb6b6 SHA-1: 5bcdacf6711c72f6f2f2977d3f24b695f5077829 SHA-256: 559d1c4ed6169d835450b75ad593359091dc654641a9f8256f8fb3a3ebf33fe1
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/pify?keyword=hepatorenal+syndrome+guidelines+2016'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The low-severity heuristic for urgency lures further supports the phishing pretext.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=hepatorenal+syndrome+guidelines+2016
    • http://xipufud.imaniyako.org/uploads/1/3/2/3/132302868/dipuve_bodoj_dakival_tutipiwiw.pdf
    • http://files.elementalcorehealing.com/uploads/1/3/2/7/132740552/jakumoxon.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/48511867809.pdf
    • https://cdn.shopify.com/s/files/1/0437/7552/5022/files/xaweninetubojolejamegujub.pdf
    • https://cdn.shopify.com/s/files/1/0428/7810/7811/files/puluka.pdf
    • https://cdn.shopify.com/s/files/1/0431/1348/0343/files/fanuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zudofujavulasosajawigubi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7239/6193/files/watumivabizaxek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0765/files/vukutuwemudi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1528/1568/files/violin_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/mefuxoku.pdf
    • https://cdn.shopify.com/s/files/1/0428/3567/3254/files/ano_ang_cuneiform_tablet_tagalog.pdf
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/57469835228.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_off00009991.bin
ac83794ccf61e73d647ee5ce4288f58a67e48d38e0e5a22e94403f40a8d3e757		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9991 5820 bytes
font_01_sfnt_off0000ad53.bin
249f645c11a8f34a3656bbc67f100f87260e2e34937e93b3a15d2eb0df5f0a60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD53 10264 bytes

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