Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6830b8c62b6544…

MALICIOUS

PDF

55.1 KB Created: 2020-08-22 11:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe6955e5767e82fb003a4f041976bf82 SHA-1: 23ac97e304e2a2f1f62773a9080bc787a779a124 SHA-256: 9b6830b8c62b65446faad8033d669ee262e3e388a30ee61161e37f9b4bcfc499
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm' and another flagging a link to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=lagu+tongga+babeleang+remix. The document body itself is heavily obfuscated and contains references to this URL and other Shopify-hosted PDFs, suggesting a campaign focused on link manipulation and potentially redirecting users to malicious content.

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=lagu+tongga+babeleang+remix
    • http://kumanu.iucnbsg.org/uploads/1/3/1/6/131637419/2106449.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/precalculus_with_limits_4e.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/alphabet_tracing_sheets_pre_k.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/luloravuzowi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9673/4885/files/19070144537.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/bosuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1164/files/robber_bob_hack_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1114/4861/files/arihant_synonyms_and_antonyms_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9458/0136/files/rotating_image_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/bisagolafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/96897708071.pdf
    • https://cdn.shopify.com/s/files/1/0433/9089/4247/files/korean_embassy_application_form.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_off00008f19.bin
3ae20f8d96566b42b013fb62db6e3c8498c39e695de555b0a55e9bae35e5ccb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F19 4976 bytes
font_01_sfnt_off00009ff5.bin
c0c7574e410a64c44f04c503c050462c255169ac8b901cb9a8fdc4310c7dbdf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF5 15388 bytes

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