Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d3c58614652011…

MALICIOUS

PDF

43.9 KB Created: 2020-08-05 02:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4972cd2e0bebcd6bcb66b5d966506fdb SHA-1: 2bfe538220d9518949f9a8be7edb7681fd27ce8a SHA-256: 38d3c58614652011c708573dbffcb24429f9b0c0a061fc86dc982c9461d0f461
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search engine results, with a primary malicious redirector URL embedded. The document body, though heavily obfuscated, contains the malicious URL, suggesting the PDF's purpose is to drive traffic to this redirector. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF.

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=printable+optical+illusions+brain+teasers+pdf
    • http://fufojone.mydnorco.com/uploads/1/3/0/8/130874493/475270.pdf
    • http://files.spacetigertattoos.com/uploads/1/3/1/4/131409794/nibigulepewelazovul.pdf
    • http://files.richardsaudek.net/uploads/1/3/1/3/131381675/funerudivi_temazakolunosu_pisidexoneb.pdf
    • http://files.nursingandpublichealth.org/uploads/1/3/0/8/130874379/bonijimed-lisajigete.pdf
    • http://binom.jennifersellettiphotography.net/uploads/1/3/0/8/130813528/wezat.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/christmas_carols_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/kurinasiwojowokavib.pdf
    • https://cdn.shopify.com/s/files/1/0438/1668/1629/files/writing_research_papers_a_complete_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/zaxuwizaluku.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0437/7093/7498/files/gisisidorewupapokotixor.pdf
    • https://cdn.shopify.com/s/files/1/0430/8487/3879/files/78870389612.pdf
    • https://cdn.shopify.com/s/files/1/0437/6700/5333/files/48613334384.pdf
    • https://cdn.shopify.com/s/files/1/0432/8810/1030/files/27483260295.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/sisum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/93460284799.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/6946703157.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/diduzerazakakutoranabato.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/1/0437/5812/5

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb9.bin
2e47c0e3f62046a9eead9cc916d6c156df78dac9c4120a026f2795a0b758b3fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB9 5288 bytes
font_01_sfnt_off00007db8.bin
30bf3b39a3fc0e80cf100a32bd7516c60158d59ee52202b7a3c75883cbd99189
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB8 10708 bytes