Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1841d166726e15…

MALICIOUS

PDF

32.3 KB Created: 2020-09-09 07:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 765cf89247ab1e1da4d5e739abf44d7f SHA-1: 1a822f6702ce1041ace777ebb5d47995d1053103 SHA-256: 2f1841d166726e15298dd047849334dd12603d0b831fbb909a863b07e49233ab
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, many of which are likely part of a link farm. The primary malicious IOC is the redirector URL. No scripts were extracted from this sample.

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.club/wix?keyword=hotstar+vijay+tv+shows
    • https://static.usrfiles.com/ugd/2b25e8_242788f237644da3bbdc1099f93c07e2.pdf
    • https://static.usrfiles.com/ugd/594ae5_5a04575436ce4555a77781cf4613c922.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_a5ce47052a9a46e888a055cd5b7d7282.pdf
    • https://static.usrfiles.com/ugd/12745a_019b2f07a24945d6b9a8bb859b38cb89.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8908/files/kegexifi.pdf
    • https://cdn.shopify.com/s/files/1/0436/7882/6661/files/najawepudira.pdf
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/91148251007.pdf
    • https://cdn.shopify.com/s/files/1/0429/1425/0905/files/tobiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/bathroom_lighting_guide.pdf
    • https://cdn.shopify.com/s/files/1/0463/9771/8683/files/worksheet_activities_for_4_year_olds.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/11418659211.pdf
    • https://cdn.shopify.com/s/files/1/0428/3655/7987/files/hp_smart_array_p410i_license_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/archinteriors_vol._46_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/mario_kart_7_unlockable.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_off000045c8.bin
1c9ffa4e1457226e69f4f3047c2472e90c04b94f32458257ce551e112117b333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45C8 5032 bytes
font_01_sfnt_off000056fb.bin
ae47f37b30e93a3a6c4fe136323eb045f6e8ae58064716dcf5d9d442e386a2ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FB 8744 bytes

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