Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f3d7a4dc5f3acf…

MALICIOUS

PDF

40.0 KB Created: 2020-08-14 19:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 511331f3ffd9213df417ca29db8851dd SHA-1: d0902431f291e701356ee7f3815b836f7ae7f187 SHA-256: 82f3d7a4dc5f3acf1e24a18881d02788f1a76fdcd19b113d6d5e501aa653eb89
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to 'https://ttraff.ru/pify?keyword=clumsy+ninja+mod+money+apk', suggesting a lure for potentially unwanted software or further malicious content. The presence of a large number of external PDF links, many pointing to Shopify domains, indicates a link farm strategy, likely for SEO poisoning or to obscure the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the primary intent appears to be directing users to the malicious URL.

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=clumsy+ninja+mod+money+apk
    • http://files.teacherbattleplans.com/uploads/1/3/0/9/130969545/pukijazawi_kabudugoderetuf_kurokamevopat_pitulutaxekasup.pdf
    • http://files.oakfamilycounseling.com/uploads/1/3/1/8/131856212/muviriledexegomuxo.pdf
    • http://juravupog.clearwaterridingschool.co.nz/uploads/1/3/0/7/130776791/gukunedekidepopef.pdf
    • http://xeditak.purplespirithealing.com/uploads/1/3/0/8/130813420/labasumovuk_rutido_viwux.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/25734594081.pdf
    • https://cdn.shopify.com/s/files/1/0437/5661/7877/files/fortune_teller_guide_persona_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/nicholson_microeconomic_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3396/files/creative_approaches_to_problem_solving_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/mcdougal_littell_algebra_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/neretidesalefadim.pdf
    • https://cdn.shopify.com/s/files/1/0431/3301/0081/files/antenatal_diet_health_education.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/xavizipexorazifobaza.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0167/files/66440778538.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_off00005f9e.bin
ef2b60e2fc9f26bfadb54daedd647ca5633bb73fc26330365bde4dfcad2f4f30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 5156 bytes
font_01_sfnt_off00007120.bin
d548e75c373f45c343884663cb26588ea71b807fae4933bcad654291fb7d4009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7120 10060 bytes

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