Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9dcdfe0bf28b5d…

MALICIOUS

PDF

66.5 KB Created: 2020-07-15 17:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58a577e836429c7c4951d24c96b62d8a SHA-1: 3752008a4333074d74af9fda476d67812190a2e9 SHA-256: 4f9dcdfe0bf28b5d77572d256d483a5e2a00d42da3762b73aae28062b7af1b93
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, indicating a link farm. One critical heuristic firing identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'technology business management book pdf', suggesting a lure to download a fake book. The primary malicious IOC is the redirector URL, which likely leads to further malicious 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/wb?keyword=technology%20business%20management%20book%20pdf
    • http://files.escalation.com.au/uploads/1/3/0/7/130739427/e4867.pdf
    • http://files.li-xiaolu.com/uploads/1/3/2/3/132302810/vodedogum.pdf
    • http://files.nanaimotreeservices.com/uploads/1/3/1/1/131164324/pazas.pdf
    • http://files.mgcfestival.com/uploads/1/3/1/4/131406108/6973529.pdf
    • http://files.museumofsocialjustice.org/uploads/1/3/1/4/131437806/gifomenefebenugonu.pdf
    • https://jifumulunubi.files.wordpress.com/2020/06/ruxumikerowejowaf.pdf
    • https://zefolij.files.wordpress.com/2020/07/93636282111.pdf
    • https://fifonupiza861279328.files.wordpress.com/2020/06/pidezulun.pdf
    • https://bujoguzone.files.wordpress.com/2020/07/mojojowovugozuwirit.pdf
    • https://tuforomo.files.wordpress.com/2020/07/13842884150.pdf
    • https://depizawadi33663686.files.wordpress.com/2020/06/27151303561.pdf
    • https://bixibirame.files.wordpress.com/2020/07/81150258062.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/gezugasaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/3810362961.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pisanebemewamabojesodid.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/nuzakexigogebu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6596/6741/files/27473657729.pdf
    • https://cdn.shopify.com/s/files/1/0430/8487/3879/files/kedegogujadamerazezi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/kitelomofuxefepozoviwoj.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_off0000a87a.bin
20c7aba426bf669eee2d78e30526daa5c8a0e2856ab88f15783c8cf01df556f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA87A 5612 bytes
font_01_sfnt_off0000bb64.bin
1aefbe257efb0c77b011b1acf2eb7a881b45623769dd790c192120a0ab4a8f30
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB64 13124 bytes
font_02_sfnt_off0000e5f3.bin
fdb4199150d2633c77ca78250181459ef7e3ee128e70c49e553cacce45d9491d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 16344 bytes