Malicious PDF — malware analysis report

Static analysis result for SHA-256 fedc9b5712642f02…

MALICIOUS

PDF

43.4 KB Created: 2020-08-03 05:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb5cbc39aa95bc3220d32269674bc236 SHA-1: 3e1c63996f53f961a6e299c004f874feafa5125a SHA-256: fedc9b5712642f02ceddbb1acc8913a1cba6baceade52de8870dc025ecfabfec
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to Shopify-hosted PDF files, forming a link farm. One of these links, ttraff.cc, is identified as a malicious redirector. This suggests the document is designed to lure users into clicking through a chain of links, potentially leading to malicious websites or phishing attempts. No scripts were extracted, and the document body was unreadable, but the link farm and redirector are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=%25D0%25B1%25D0%25B5%25D1%2581%25D0%25BA%25D0%25BE%25D0%25BD%25D0%25B5%25D1%2587%25D0%25BD%25D0%25BE%25D0%25B5+%25D0%25BB%25D0%25B5%25D1%2582%25D0%25BE+%25D0%25BA%25D0%25BE%25D0%25BD%25D1%2586%25D0%25BE%25D0%25B2%25D0%25BA%25D0%25B8
    • http://files.emilyannscott.com/uploads/1/3/1/3/131381681/balujaxuvejedip.pdf
    • http://files.puppyloveplaydates.com/uploads/1/3/1/4/131453645/wuvamurafemesiwuv.pdf
    • http://files.mokanjaxwax.com/uploads/1/3/0/7/130776263/5731854.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/jemilamelizox.pdf
    • https://cdn.shopify.com/s/files/1/0428/5464/5916/files/molofomolowo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40313354442.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2033/files/wozuzoxiwivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/98013290020.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8176/files/9828241900.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/mesibikaremo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8821/files/rudigon.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/fitivavetixapiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/80324339745.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/vomamidujavapujirikuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/64902187537.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_off000061d1.bin
32f90540557933722c36cb6bc17a443d5cb3824ce6dcc772d5b4ad8bae28dbb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D1 5152 bytes
font_01_sfnt_off000072e2.bin
08f34a7b5dcb9009352a30d329da8488f15b62046198d7ee2fb1e3debd6b70f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72E2 13524 bytes

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