Malicious PDF — malware analysis report

Static analysis result for SHA-256 973086c17cb8f3e8…

MALICIOUS

PDF

47.1 KB Created: 2020-08-07 05:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52d348e81a30a574448493cc5c3dc482 SHA-1: f98c4500f3fc83542bafca5e1d55adbb90bb4507 SHA-256: 973086c17cb8f3e8927d9f80c9c051a2e0c55f7f6f4ef8e5381d361821599f27
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. It also exhibits PDF_SEO_LINK_FARM behavior, with numerous links to external PDFs, likely to obscure the malicious redirect. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=gummy+bear+science+experiment+pdf, which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious content via a link farm.

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.ru/pify?keyword=gummy+bear+science+experiment+pdf
    • http://files.jesuitapush.com/uploads/1/3/0/7/130739618/c113096.pdf
    • http://files.laurakarina.com/uploads/1/3/1/4/131438155/9618171.pdf
    • http://files.kaufmanfieldguides.com/uploads/1/3/1/4/131406507/f290259b2dbeb22.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/old_yeller_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5140/8799/files/nomojofogovomigufavogiba.pdf
    • https://cdn.shopify.com/s/files/1/0432/3206/7739/files/wutolitizalidorugo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/finozedikuxesuja.pdf
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/melitesajitow.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pinabazebovo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/tirijufomiso.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1298/files/essential_english_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0428/8793/8211/files/41537131151.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6972/files/vegap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006919.bin
c9220e47965e72076d515dc008e96b8bb3380db13546cfb57809425127ef9155		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6919 5380 bytes
font_01_sfnt_off00007b56.bin
f14a0b0057ac0ad5ce48d4bfbb867a07665035bb70d68b17967319ac5bec2adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B56 11608 bytes
font_02_sfnt_off0000a183.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA183 4324 bytes

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