Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1dc2d75b3cade88…

MALICIOUS

PDF

67.0 KB Created: 2020-08-13 21:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71fd2fb14066fb106daa091b3f9075ea SHA-1: 20fcd5f77de725cbaad41a2e5ab8c00879164951 SHA-256: a1dc2d75b3cade882274a3933136bad08438471fa32a5fe82fb16e5a4ac4ce0e
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, pointing to a URL that appears to be a lure for a modded APK. The document body also contains this URL and references to 'Valkyrie crusade 6.1.0 mod apk'. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is the redirector, which likely leads to further 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=valkyrie+crusade+6.+1.+0+mod+apk
    • http://files.1169certified.com/uploads/1/3/0/8/130813887/mepezamazoda.pdf
    • http://files.thecheesecakebee.com/uploads/1/3/2/6/132681316/d265668104.pdf
    • http://files.i40challenge.com/uploads/1/3/0/9/130969470/wopelemawaxe-jajozexem-salipeguta.pdf
    • http://files.quadcityarts.org/uploads/1/3/0/7/130740221/fdbe5e801f.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/visodatog.pdf
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/avant_propos_rapport_de_stage.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3669/files/bukojusof.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/rofivokexefumuxozisebep.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/mixug.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/96625762394.pdf
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/xikate.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/jirofijite.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/fupaku.pdf
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/travel_agent_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/46887393517.pdf
    • https://cdn.shopify.com/s/files/1/0433/1424/9886/files/zokagige.pdf
    • https://cdn.shopify.com/s/files/1/0439/4788/4702/files/are_you_smarter_than_a_5th_grader_quiz.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bbd.bin
4bf80d4d82d8d17d4f271516afb9698f52afb942349c872042733a826fdb4c63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBD 6672 bytes
font_01_sfnt_off00009284.bin
e1c63514a84210db324df9ff2eebe5d289a2c474e5d94e1f0838f22c15b80776		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9284 5732 bytes
font_02_sfnt_off0000a5f4.bin
488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F4 6148 bytes
font_03_sfnt_off0000b5d4.bin
b8340a690da1633d9296e7746c53e75587321b00646667cf5145bcc7c55909c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5D4 15332 bytes
font_04_sfnt_off0000e626.bin
f22c3c415f763daa720385eeadc5e6b7f3a2e80f9eba5500c6dd36063ccab0ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 16388 bytes

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