Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdbc6097e4ec96b3…

MALICIOUS

PDF

43.5 KB Created: 2020-08-02 01:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b4f2f8cb3489565b9148a4a94adb516 SHA-1: a49e102538a891b01af5407c06bbc5b71ea59b0c SHA-256: bdbc6097e4ec96b304a20e5f4e69b729fa6e2ba9bd0e66dcf52147dc724ce05a
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.com/pify?keyword=bicycle+repair+pdf. The document body, though heavily obfuscated, contains references to 'bicycle repair pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. No scripts were extracted from this sample.

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.com/pify?keyword=bicycle+repair+pdf
    • http://files.notesmove.com/uploads/1/3/0/8/130874265/fiwesipav_xadixixulir_jomudobejilusu.pdf
    • http://files.pushingupdaisies.org/uploads/1/3/1/4/131452811/nodosutisirelabozebu.pdf
    • http://files.shannonroubicek.com/uploads/1/3/2/7/132740288/1dc12591f4c09b0.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/kufewatifijogikubame.pdf
    • https://cdn.shopify.com/s/files/1/0429/8581/6217/files/62522314873.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/vabisofatirobume.pdf
    • https://cdn.shopify.com/s/files/1/0428/5402/3327/files/bexamubum.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9384/files/1881596912.pdf
    • https://cdn.shopify.com/s/files/1/0433/9095/9766/files/70592741854.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/tulipizogoduvubesozadabex.pdf
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/16904801087.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/85326329726.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9204741539.pdf
    • https://cdn.shopify.com/s/files/1/0428/9216/5279/files/laxozoxowubapove.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/40570607751.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/buribijefejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0163/4213/files/fewuwerufexin.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_off00006d57.bin
1eb39baced9322f1f45f3410794df4f4297129c7045aaddded8876498cc039d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D57 5124 bytes
font_01_sfnt_off00007ee2.bin
ad94602e2d0618706eb738fb8ffa165e86fb35ef5e42d03a4ddee2952d152429		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE2 10020 bytes

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