Malicious PDF — malware analysis report

Static analysis result for SHA-256 d933da46ce0ef94f…

MALICIOUS

PDF

46.9 KB Created: 2020-08-03 21:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64760e985cd1ecdd9da359ee14d6e7f3 SHA-1: 70a5f523d07359cf5dc83808aab063fd260f1c48 SHA-256: d933da46ce0ef94f6c61f47916c136265fd81883c10ec6f4b9c3023038ba6233
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One of the primary URLs, 'https://ttraff.ru/pify?keyword=konsep+dasar+akuntansi+syariah+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a coordinated effort to distribute malicious links under the guise of academic 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=konsep+dasar+akuntansi+syariah+pdf
    • http://files.buckinghamcharitycup.co.uk/uploads/1/3/1/0/131070689/kodarovomenozas-jotinudafema-kotosuvenili.pdf
    • http://files.opulashbeauty.com/uploads/1/3/1/3/131380128/1047134.pdf
    • http://files.lynnschins.com/uploads/1/3/1/6/131637239/dukowuti-gevuvaxilomu-pizevuxixawiwuk-kataxerewo.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/94605595021.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/xaxobut.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4993/files/38175249891.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8372/files/steampunk_minecraft_texture_pack.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1287/files/29735551613.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/fovilizonelurizodudu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2696/4903/files/85483008897.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/jokekofikelufiwilepofu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8412/files/nipukuwebipob.pdf
    • https://cdn.shopify.com/s/files/1/0434/4738/6264/files/90276866356.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/12839432926.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1966/files/zexuvomulol.pdf
    • https://cdn.shopify.com/s/files/1/0430/3175/6957/files/diliwegus.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_off0000784b.bin
5df9bacd2cafaae8f52fc48426c0f17a7fe37d134dc54c2cf58cac09e1b5573c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x784B 5232 bytes
font_01_sfnt_off00008a21.bin
b3afa399092265f4c73cd0f166610872acd8b67311dc1e04abd865425acd157b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A21 10876 bytes

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