Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0d69c701ac58c6…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 01:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70408d1e50f17cb0ee2cd62ebaa8970e SHA-1: 95395cdadfee1119adb0100150bf04f8688ce135 SHA-256: ae0d69c701ac58c610aca4681b8682bd1fec60fd461ddedf1832ecc32c3890c1
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=yorkie+pom+info'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links to external PDFs. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'Yorkie pom info', suggesting a lure to a malicious site.

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/wix?keyword=yorkie+pom+info
    • https://static.usrfiles.com/ugd/accd1f_daaf8118dd3941fa9ea6e2a96ad390e0.pdf
    • https://static.usrfiles.com/ugd/9d869b_a42a305b873b4a5c82e65f738a19dcef.pdf
    • https://static.usrfiles.com/ugd/73cb9e_3c8030e2417e4a5abef5e54fd5d63bd4.pdf
    • https://static.usrfiles.com/ugd/b8c837_67eb5d5703fc4132aa067bcf59a9372d.pdf
    • https://static.usrfiles.com/ugd/8cbfce_41cccc0f06dd4f08a84d68b048f58c3a.pdf
    • https://cdn.shopify.com/s/files/1/0433/9345/0134/files/26288192096.pdf
    • https://cdn.shopify.com/s/files/1/0430/7632/1434/files/insaniquarium_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0462/2896/3482/files/baal_veer_hd_photo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/47522887811.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2412/files/sisinofamorasejogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/zotugifujitiwavaxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/rijetorige.pdf
    • https://cdn.shopify.com/s/files/1/0430/5249/9098/files/numerical_reasoning_reviewer_for_civil_service_exam.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_off000061e1.bin
50a467edad7ced12b94ac4edd032695e63af8e8d30de20e33f5a8d9e37c7b625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E1 4652 bytes
font_01_sfnt_off0000719c.bin
0525beb6eb21e344343b581e335818d184c07554af33eb652a1f192f7c9bec53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x719C 9904 bytes

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