Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82127e6641afa21…

MALICIOUS

PDF

54.1 KB Created: 2020-07-30 02:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 501625c1fdb72f3ead5df8c7674c6233 SHA-1: 1645fbcfdd75ec8b0085266c806311b6ac354893 SHA-256: e82127e6641afa2182fa9d723d2e0c8cab8f60c67962df1f09e00b04f7fea7fa
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is further disguised as a free book download. The document also exhibits a PDF link farm heuristic, indicating a large number of outbound links, many of which point to Shopify domains hosting other PDFs. This suggests a campaign focused on driving traffic to potentially malicious content through deceptive means.

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=online+bangla+book+pdf+free+download
    • http://files.leisterfund.org/uploads/1/3/1/4/131452952/vupilaxojudusa.pdf
    • http://files.cclrd.org/uploads/1/3/0/7/130740049/paxitemewuke-bikemibadojevuj-wulesuda.pdf
    • http://files.clast2019.com/uploads/1/3/0/7/130775868/towuz.pdf
    • http://files.motherwrenstudio.com/uploads/1/3/1/4/131408142/rawati.pdf
    • http://files.leisterfund.org/uploads/1/3/1/4/131452952
    • https://cdn.shopify.com/s/files/1/0435/3366/4408/files/95335771820.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/73968645521.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/tibomuted.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/83490694992.pdf
    • https://cdn.shopify.com/s/files/1/0437/4901/5706/files/zojivurasoxajukasuzaleku.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/rekemifonikajigiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/kifejebelivopagab.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/kusovozafajexemow.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/gufevomumuruvar.pdf
    • https://cdn.shopify.com/s/files/1/0432/1162/0509/files/46606375607.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/67494830132.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/87695317777.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a1a.bin
3c9da25940efe8cd0678da1868032e2e8285bb1d006ee22be6c41e9bafcdbad8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1A 5060 bytes
font_01_sfnt_off00007b62.bin
03f41c8ec538b067fbf5e5517745be5e56a511052f2928c0f308cbbb698c0817
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B62 10648 bytes
font_02_sfnt_off00009c13.bin
76efc3ce5b215c80a2b088b004ab59e372a88ae16c329294bf13fc45de8c478e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C13 15124 bytes