Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb50add99255923…

MALICIOUS

PDF

42.1 KB Created: 2020-08-11 12:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 820e258800ae9d8b8763330c41b9f215 SHA-1: 21e8752010993c8e7cd122c672d280ad92e1fb5b SHA-256: dbb50add992559239b3eb3c3a359444ce6813dcbf53544c4d61f89939e05fd93
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on Shopify. One of the primary links, disguised as a search for 'best pdf app for ipad', redirects to a known malicious domain (ttraff.com). This suggests a link farm or redirection attack designed to lead users to malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector and the link farm strongly indicate a malicious intent.

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=best+pdf+app+for+ipad
    • http://files.my-grandview.com/uploads/1/3/2/7/132712040/pozuxajog.pdf
    • http://files.torontopilipinosdachurch.org/uploads/1/3/1/6/131606035/tuger-zegunidulukaf.pdf
    • http://nodiz.eastsuburbanconnect.com/uploads/1/3/1/4/131437987/sujegiliti-bumowogo-norawijafof-liveba.pdf
    • http://digoreve.fortheloveoffitnessapparel.com/uploads/1/3/1/4/131437657/gejovelemuwasek.pdf
    • https://cdn.shopify.com/s/files/1/0437/2781/4805/files/leetcode_reverse_linked_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/8603652406.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/68511016113.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/92836293764.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/26029145228.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/fokiv.pdf
    • https://cdn.shopify.com/s/files/1/0437/9626/7168/files/xilol.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/kefikotilanuvasixuvuve.pdf
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/74663613362.pdf
    • https://cdn.shopify.com/s/files/1/0433/4593/6534/files/e._coli_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/78809024596.pdf
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/28479464640.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0163/files/cervical_pain_exercise.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_off00006763.bin
3b1750360eef0a7ce42d75fa64a6f460768cf90ba2c5016c2196e4c74c1b666c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6763 5052 bytes
font_01_sfnt_off000078a3.bin
eb9a46acda2d8eb41c69977bb2d0653c02805494d0c1f34e0381250245a20593
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A3 10248 bytes