Malicious PDF — malware analysis report

Static analysis result for SHA-256 4282c98e177505c2…

MALICIOUS

PDF

42.1 KB Created: 2020-08-16 21:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f0a30af65335a67b4d6db2f46c75def SHA-1: 56fe97bf7921a7bb21b48558c22f8e6f6acbbbf2 SHA-256: 4282c98e177505c2b2f167f40c7b18ea8fed545b4801c078ec2f5764bd21e4f5
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users into downloading PDFs, with one critical link pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to downloading free PDFs and includes the malicious URL. This suggests a phishing or social engineering attack aiming to redirect users to malicious sites.

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.cc/pify?keyword=cristianismo+puro+e+simples+pdf+baixar+gratis
    • http://files.cognoscereconsult.com/uploads/1/3/0/8/130874304/navawogi.pdf
    • http://files.iatbr2018.org/uploads/1/3/1/1/131163733/wufixiwufosawijewi.pdf
    • http://files.partscare.aero/uploads/1/3/1/4/131454620/ginoxaja_mosozina_lumuburonulu_gadulopu.pdf
    • http://vagev.bradfordalliancechurch.com/uploads/1/3/0/7/130775320/3de29ef3515.pdf
    • http://files.samanthamesserartist.com/uploads/1/3/0/7/130739385/bexuku_pumakivura_tufuj_bikulir.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8823/files/jefaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9424/files/17835345001.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/sirir.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/17839780950.pdf
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/tigopaputado.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/sample_covariance_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/fodewisavawibukadalitaxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/gosukifef.pdf
    • https://cdn.shopify.com/s/files/1/0437/1605/1096/files/jimani.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/72256374931.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3852/files/sebevurejomuwaxukas.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3541/files/74245402126.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/1180150267.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_off00006569.bin
a04116139aa8fcef16373364195e22e6d1ac4ae3d422c2a3c78fb7f341451c7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6569 5476 bytes
font_01_sfnt_off000077eb.bin
b1a723067686920e0f32e960b1aae23331441626a77956bbb5263d47fe792082		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EB 10260 bytes

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