Malicious PDF — malware analysis report

Static analysis result for SHA-256 2863549f088e008b…

MALICIOUS

PDF

53.4 KB Created: 2020-08-10 12:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb8a8a9caab1baf3e7d81d138809a735 SHA-1: 0a7771662c1e0bf3422b3a9cde011309d30945ed SHA-256: 2863549f088e008be3d7d0021555a129ab39f5e1f102bfc88b0db2cc050873fd
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely part of this link farm. The presence of a redirector suggests an attempt to lead the user to a malicious site, potentially for phishing or to download further malware. 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.com/pify?keyword=faringoamigdalitis+bacteriana+pdf
    • http://sozufev.ftxr.com/uploads/1/3/2/8/132814930/bukovaradufa.pdf
    • http://files.ysgolmaesglas.com/uploads/1/3/0/9/130969873/8602703.pdf
    • http://files.soulflowerhealing.com/uploads/1/3/1/6/131606111/9917181.pdf
    • http://dawujamo.avondaleicelandics.com/uploads/1/3/0/7/130776611/34dcb0384.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5197/files/32671345699.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/cessna_172sp_poh.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/kusapamupiwapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/jutefaloxokijefavomimel.pdf
    • https://cdn.shopify.com/s/files/1/0437/3394/2423/files/tactics_for_toeic_listening_and_reading_student_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/8540/5089/files/46179519234.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/5396867265.pdf
    • https://cdn.shopify.com/s/files/1/0434/1239/0038/files/busizuvidulijofavu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/6747108819.pdf
    • https://cdn.shopify.com/s/files/1/0431/4988/5606/files/93452771819.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_off0000920f.bin
e657211d59b9a7cd35d02fe9fe7345cac16042152541de73fad33ba6e2a4a174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x920F 5568 bytes
font_01_sfnt_off0000a4e8.bin
8d372bf36294304fe1f2db37aca79d8d2eabcf45764af400f6290bde8b5d602f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E8 10640 bytes

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