Malicious PDF — malware analysis report

Static analysis result for SHA-256 5253a4d1668045e2…

MALICIOUS

PDF

43.7 KB Created: 2020-08-02 04:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95b84f22a00a2583dec20733b0bb0a8b SHA-1: adbc122f110f90ecabdf8d6634cf9e2f391ba9f0 SHA-256: 5253a4d1668045e26dfc5a450a9aa57697e52e42ec27d31b50e3fa98e5fd4b52
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and other benign-looking Shopify URLs. This suggests the PDF is designed to trick users into visiting the malicious redirector, likely as a lure for further malicious activity.

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=cypher+system+rulebook+pdf
    • http://files.amblesidesanangelo.net/uploads/1/3/1/4/131438308/8af52ce688.pdf
    • http://files.mandelcounseling.com/uploads/1/3/0/8/130873736/wegalaf-mabedijupob-fezawiwi.pdf
    • http://files.neuroimmunepn.org/uploads/1/3/1/3/131380583/jolod.pdf
    • http://files.kahua-ranch.com/uploads/1/3/1/8/131858975/mifivinusujeges-botijisori-zixemobexubes-rovotojinusax.pdf
    • https://cdn.shopify.com/s/files/1/0434/3876/8294/files/defibifeponasa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5430/9274/files/gurufadovalasiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8870/files/nukoziwelavulisuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3902/files/xufutujajigegabatev.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/repeating_pistol_bloodborne.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6551/files/campbells_biology.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/tesujidak.pdf
    • https://cdn.shopify.com/s/files/1/0435/1698/5508/files/37780974822.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/5195401456.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/bukukatexaxunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/mukisowumodomudofak.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/firupiwamuxan.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_off00006c31.bin
3cce19d45121c3d46191dc15d5bdc68d738df557d4ad92723cdb44b9d4e4c8cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C31 5284 bytes
font_01_sfnt_off00007dfe.bin
0e6bee492b503a02c81172033eba0b5230d6a1c471699e12843b56c843e744c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFE 10060 bytes

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