Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85f3f99c91bc2e5…

MALICIOUS

PDF

47.6 KB Created: 2020-07-24 13:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9426bd2da3ed5149e802ed076e5afc55 SHA-1: b8bc4d7d1b6181eba83f664ea149b398f2b6f042 SHA-256: b85f3f99c91bc2e5eef40b425bfa40e9ee7525facc8e466b431952b67a98bb8d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'ringtone'. The presence of numerous external PDF links suggests a link farm or redirection strategy to obscure the ultimate destination. No scripts were extracted, limiting the analysis of direct execution capabilities.

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/pify?keyword=wapking+pachtaoge+ringtone
    • http://files.polyma.dk/uploads/1/3/2/7/132711999/tabodexofetoj_zuwazifefoget.pdf
    • http://files.dejaboties.com/uploads/1/3/0/8/130873708/repizugan_resugoxirukaku_toruduxoj.pdf
    • http://files.girlwiththeflowertattoo.com/uploads/1/3/1/4/131454791/5da01b1b8a.pdf
    • http://files.iispsc.com/uploads/1/3/1/4/131437181/6921577.pdf
    • http://files.girlwiththeflowertattoo.com/uploads/1/3/1/4/131454791
    • https://cdn.shopify.com/s/files/1/0430/8631/5671/files/67969773860.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/23921062515.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/tonupulabularari.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zosogorimojafi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35117459625.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/11589242452.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7086/files/kerunisosotutugakiwud.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/mapazedonemevex.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/nuvezubupu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/rinubirimiperajozofeza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7770/files/16131122161.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/kefulepoluvab.pdf
    • https://cdn.shopify.com/s/files/1/0433/3692/5342/files/90744085465.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_off0000678f.bin
ee29d28587225ce9b24b6f0b2b92a7afb435c09b3b255ae3f8a9d5bddcb1b28b
pdf-font-stream PDF embedded font (sfnt) at offset 0x678F 4848 bytes
font_01_sfnt_off00007804.bin
4d5406c83d3e986b05e14ad6a7f3bfd065f2dd75651432a1f387213d18d30000
pdf-font-stream PDF embedded font (sfnt) at offset 0x7804 2792 bytes
font_02_sfnt_off000083e2.bin
7571dc8dc4c3924073c4d410daeca530a0547e691a104bb3bdca0f64b80d6009
pdf-font-stream PDF embedded font (sfnt) at offset 0x83E2 14084 bytes