Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a5b88bbb988f590…

MALICIOUS

PDF

40.6 KB Created: 2020-08-07 09:30:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 594bfafd07664461fc32f0202d4752e0 SHA-1: 7f7d235b07ab382f12d45a5ff68e9dccfb788303 SHA-256: 1a5b88bbb988f5901294ca811fcdbac68234791b55aee90ca2a41af8faf31e6f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to distribute malicious content or redirect users to harmful sites. The document body, though heavily obfuscated, contains the URL of the malicious redirector and a list of other PDF links, suggesting a lure to download or view further content which likely leads to malware.

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=proposal+pendidikan+agama+islam+pdf
    • http://files.mountainrecreation.net/uploads/1/3/2/7/132740541/wiperumulebero-baketide-vojejer-bidetofitadosa.pdf
    • http://files.raphel.com/uploads/1/3/1/4/131453194/7864879.pdf
    • http://files.dnatransfiguration.com/uploads/1/3/1/4/131407823/kemiduwe.pdf
    • http://files.heberwildhorses.com/uploads/1/3/1/8/131871518/mivulexomex.pdf
    • https://cdn.shopify.com/s/files/1/0434/3981/6861/files/pamadagigunubojomiwozod.pdf
    • https://cdn.shopify.com/s/files/1/0429/1608/5916/files/bible_quiz_bee.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/distressed_debt_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/78469348547.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/bulidusojumurulasesopolop.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/muvigimif.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6534/files/74316449801.pdf
    • https://cdn.shopify.com/s/files/1/0435/5640/5411/files/43547911951.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/matam.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0604/files/baferejonalidadepix.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/27554808644.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_off000060ad.bin
bdb0d4d050e0244a54690dad0343e597d1efe3562aab0fb249cba4a3a745acfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 5428 bytes
font_01_sfnt_off0000730f.bin
feecff76d9f2b058a0d119d7771f8b4525495c527a23cd038b905e6f585c79f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730F 10068 bytes

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