Malicious PDF — malware analysis report

Static analysis result for SHA-256 c35578a0283aa591…

MALICIOUS

PDF

44.1 KB Created: 2020-08-22 04:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d7a5495ff9f78f693cf4ca37cbaf7ba SHA-1: e85186a4d7a0c3c026cbb9087b09c2f9a74745f0 SHA-256: c35578a0283aa591524839887c901671e675e60f08cf75cd835d10008d54b9e8
120 Risk Score

Malware Insights

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

The PDF contains a link farm, with one prominent link pointing to a redirector URL. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary goal is to redirect the user to a malicious site, likely for phishing or malware delivery.

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=answers+of+ch+3+science+class+9
    • http://files.vf-pkb.ch/uploads/1/3/1/4/131407164/7914513.pdf
    • http://files.eedstanzania.org/uploads/1/3/1/0/131070434/38ff526c32c96a.pdf
    • http://files.elitesandvolleyball.com/uploads/1/3/1/6/131636866/ginolerimujogafakoni.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/ielts_reading_academic_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/kekoza.pdf
    • https://cdn.shopify.com/s/files/1/0434/0531/2163/files/betix.pdf
    • https://cdn.shopify.com/s/files/1/0436/7283/0105/files/critical_path_analysis_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5276/files/bsc_nursing_syllabus_mpmsu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6128/8868/files/bmw_320i_2006_performance.pdf
    • https://cdn.shopify.com/s/files/1/0431/3517/2770/files/materi_belajar_gitar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0371/5481/files/dusefosutewe.pdf
    • https://cdn.shopify.com/s/files/1/0436/5176/0281/files/fusionner_plusieurs_jpeg_en_1.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/leluxoruropemujimotelik.pdf
    • https://cdn.shopify.com/s/files/1/0429/9961/1553/files/amortization_questions_and_answers.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/
    • https://cdn.shopify.com/s/files/1/0436/7283/0105

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e3b.bin
cccbc4b6fe1f691c55ab1aa4b093fdd90fe53dfcde44365d331f090e27d3bc87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3B 5372 bytes
font_01_sfnt_off0000807e.bin
f82afccbc49d7b9027f285ce92d39f553c9a79b0e7aa01dc74eb988e7ac2e064		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807E 10180 bytes

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