Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8d0b9fd6f10d3e7…

MALICIOUS

PDF

56.1 KB Created: 2020-08-12 12:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3acf6bc898027971fdd94d52573c97f3 SHA-1: 1ac433a67c23d8fe5f0e7a232099db84e9cee34e SHA-256: e8d0b9fd6f10d3e718c81d17915531783abea9f3c37957d500c1bb0240568520
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. This redirector is designed to lure users to download a PDF, likely a phishing or scam document. The presence of a link farm further supports the malicious intent of distributing unwanted content.

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=bristol+stool+chart+pdf+download
    • http://files.donviecelli.com/uploads/1/3/1/4/131407857/sobimewes.pdf
    • http://vofakare.sirsdigitalcommerce.com/uploads/1/3/0/7/130776433/dideno_susekowijafif.pdf
    • http://vopaxixa.ladieslearnenglish.com/uploads/1/3/0/7/130738731/3389600.pdf
    • http://files.imasters-international.com/uploads/1/3/2/6/132695805/b13714710e9.pdf
    • http://koxeku.mshsupwardbound.com/uploads/1/3/0/7/130739192/lijepebetoka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/b4_public_finance_and_taxation.pdf
    • https://cdn.shopify.com/s/files/1/0440/2036/7510/files/bookkeeping_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/93185160669.pdf
    • https://cdn.shopify.com/s/files/1/0437/0913/7049/files/26536353310.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/rugexirubodibizosupi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0357/4432/files/agilmente_libro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/23538753030.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/74171802707.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4773/files/advanced_mathematical_concepts_precalculus_with_applications_online_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/0462/4021/files/13965262555.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_off00009cdf.bin
a36969a6ce2e00c2f4adb11af179724da5d446921d5d4bee9178676b3a26760f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDF 5384 bytes
font_01_sfnt_off0000af38.bin
32216bcbbf86eca79535e3a1d9e891ab0c18b8f0f765866b62eda776b7ea6f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF38 10504 bytes

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