Malicious PDF — malware analysis report

Static analysis result for SHA-256 5647da0046a3d7e6…

MALICIOUS

PDF

43.5 KB Created: 2020-09-01 20:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5054f04c1bece873a9e0a689c91c6a08 SHA-1: 02ff133beb9ebead8b696b984fda036275e62cbd SHA-256: 5647da0046a3d7e61b8f946dc521122592e49776fdc73dfa0858a16eedd87a3c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links pointing to external PDF files hosted on Shopify. One of the primary links directs to a known malicious redirector at 'ttraff.ru'. This suggests a campaign focused on SEO manipulation or distributing malicious content through a large number of seemingly benign links. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf.

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=alliteration+sentence+formation
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/zuzagololamifawoko.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3223/files/14000283182.pdf
    • https://cdn.shopify.com/s/files/1/0428/4140/7644/files/sociology_and_anthropology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/lanareruwonesakak.pdf
    • https://cdn.shopify.com/s/files/1/0428/7840/2723/files/gamabiduviper.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/ecuaciones_diferenciales_dennis_zill_3_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/77342303349.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/minecraft_shader_1._8._7.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/maxukokugulemone.pdf
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/ssc_marksheet_online_gujarat.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/91795418246.pdf
    • https://static.usrfiles.com/ugd/b8c837_888e89948d9342229ae989069cec562d.pdf
    • https://static.usrfiles.com/ugd/e643da_dbb3c8dd89754a86a80250282406086e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2977d4f4b08f41228e7cb93640987667.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_off00006c90.bin
45e426c6ad3cc37ddb0c7050989b920d2914ec9bfb83667107517123f5537763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C90 5016 bytes
font_01_sfnt_off00007d89.bin
37adeee8c97c528839ed6c265305d4defbfb3238d4b276571920ada181f1cc07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D89 10556 bytes

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