Malicious PDF — malware analysis report

Static analysis result for SHA-256 443c0d61530dadc7…

MALICIOUS

PDF

44.3 KB Created: 2020-08-20 19:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a443d02280f267b05db3fe7a5d0da719 SHA-1: 1a726c6399b3bcc97bec559a5e481dd8a527fa44 SHA-256: 443c0d61530dadc7b42b74265edc276a18fdb83fb2823aee2e446a823e04185b
128 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, which is the primary attack vector. It also contains a PDF link farm heuristic, indicating mass distribution of links. The document body, though heavily obfuscated, contains the malicious URL and several benign Shopify URLs, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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.cc/pify?keyword=business+card+size+photoshop
    • http://nutur.thecornerstohr.com/uploads/1/3/1/4/131409546/6433884.pdf
    • http://files.chushinaikikai.com/uploads/1/3/2/3/132303286/kosovidisubunuse.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/28172600868.pdf
    • https://cdn.shopify.com/s/files/1/0437/4921/2309/files/grandstream_ucm_6204_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/masijajewipudo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6594/7798/files/chagas_diagnostico.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/90687696164.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/free_online_photo_collage_maker_no.pdf
    • https://cdn.shopify.com/s/files/1/0438/0013/3793/files/nist_800_82.pdf
    • https://cdn.shopify.com/s/files/1/0449/8885/8536/files/avd_manager_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/brevi_racconti_in_inglese.pdf
    • https://cdn.shopify.com/s/files/1/0438/1330/6530/files/81758369891.pdf
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/9486783661.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4238/files/11842539734.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_off00006e02.bin
eb6830eb20a190190ce7c8ed7e81c363ba678c1f22d2ccbf7ef87b75f6554822		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 5228 bytes
font_01_sfnt_off00007fc2.bin
d1d335121b652e233b65e9c5327c98431be25da664993b713fcbfa6fc3c998bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC2 10764 bytes

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