Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca75953192cb5e2e…

MALICIOUS

PDF

44.9 KB Created: 2020-07-30 22:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5256dff89913487c1b310614ff09a1ea SHA-1: e177e108d565d0c73c24d2472a0c240ca2e01f17 SHA-256: ca75953192cb5e2e49988e4aa8b95f168244b9f97a88b46ee439f096709162d7
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference 'Attention deficit hyperactivity disorder 2020 pdf', suggesting a lure to disguise the malicious links. The presence of a link farm further indicates an attempt to drive traffic to external sites.

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=attention+deficit+hyperactivity+disorder+2020+pdf
    • http://files.fflinstall.com/uploads/1/3/0/9/130969999/bedatowitopavij.pdf
    • http://files.legacybuildershc.com/uploads/1/3/2/8/132814220/miseworuzusir.pdf
    • http://files.violinstringreview.com/uploads/1/3/1/3/131398091/93bfd50a438.pdf
    • http://files.premiertags.uk/uploads/1/3/0/9/130969683/1bc79209ea22.pdf
    • http://files.violinstringreview.com/uploads/1/3/1/3/1
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/93348129346.pdf
    • https://cdn.shopify.com/s/files/1/0440/3612/8933/files/52140356011.pdf
    • https://cdn.shopify.com/s/files/1/0437/1401/9496/files/70277167235.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5877/files/61540920859.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/tagopel.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/84783369736.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88020392138.pdf
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/95066062142.pdf
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/nivimapibamovivavekalusil.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/11953998090.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/nivomuzasigegitekudizone.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/9556606386.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/80003116654.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_off0000725c.bin
a61032d70341faeec182cde08fc982c6c8fe1c638b6eabda0748ff53b7fb81f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725C 5424 bytes
font_01_sfnt_off000084cd.bin
3e03fae291340b50d1a5b8620b3d34ec241d4b4a6b26744cc64a6ac4604ca50e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 9768 bytes

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