Malicious PDF — malware analysis report

Static analysis result for SHA-256 f551bc18ea42175d…

MALICIOUS

PDF

41.4 KB Created: 2020-09-09 07:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a17d4d6b814ac5da41872b2b3390ebe3 SHA-1: 9035a8e0836f76b4cc5d6223cf28f0bc3da3a392 SHA-256: f551bc18ea42175d33118f6f95f31d486d7bc2a1d22a9bc6a6b4ec59620dd5c0
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The embedded document body text, though corrupted, contains keywords like 'vmware free for pc' and a URL that aligns with the redirector finding. This suggests a phishing attempt to lure users to a malicious site under the guise of offering free software. 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.me/wix?keyword=vmware+free++for+pc
    • https://cdn.shopify.com/s/files/1/0435/4493/6599/files/59880804449.pdf
    • https://cdn.shopify.com/s/files/1/0433/4508/4574/files/685703128.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/galuta.pdf
    • https://static.usrfiles.com/ugd/8c0e65_af1edffc783f4e13a718d5e237c4b7b3.pdf
    • https://static.usrfiles.com/ugd/21e6f2_1118e37322d04f7f9aa1017f2070e452.pdf
    • https://static.usrfiles.com/ugd/912de2_0bf99a705ab149c890bc30938b8b4dd2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12909571685.pdf
    • https://cdn.shopify.com/s/files/1/0431/0731/9965/files/20387272192.pdf
    • https://cdn.shopify.com/s/files/1/0430/8480/8346/files/reading_bar_graphs_worksheets_1st_grade.pdf
    • https://static.usrfiles.com/ugd/66f7a0_d58291f8b8c9428f93d8cd436e930773.pdf
    • https://static.usrfiles.com/ugd/32acb1_d8a30a87e062405c842ece7e0d7cc66b.pdf
    • https://static.usrfiles.com/ugd/6d45f6_213cb143fc74471a8483e963c245c0ee.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_off000063ab.bin
6625a3190e4bb2933e43f36bfe9453be053d71761ba476ba5431cbc056cdd253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AB 5008 bytes
font_01_sfnt_off000074b6.bin
d9937c79280e970f1d7f3e46311f6b396e475df079d5a5cee98a87d7523e7935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B6 10676 bytes

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