Malicious PDF — malware analysis report

Static analysis result for SHA-256 81601468f31726ed…

MALICIOUS

PDF

48.2 KB Created: 2020-08-15 22:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1801a46d4c83a878b1648a757581e11c SHA-1: e08db2ab795fab459820028efe4dbfb48489bbd7 SHA-256: 81601468f31726ed0283dffedf1f689f7a4881c0e46a7591ea9fef246c646c39
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'resume format for freshers download pdf' and the malicious URL itself. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content, potentially for credential harvesting or malware delivery.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=resume%20format%20for%20freshers%20download%20pdf
    • http://wijofo.acbusinessschool.com/uploads/1/3/0/7/130776779/3399677.pdf
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/kejopisejesipok.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/puvos.pdf
    • https://cdn.shopify.com/s/files/1/0433/3957/9546/files/cancer_de_garganta_por_vph.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3418/files/direct_method_and_grammar_translation_method.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/74892584582.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2919/files/convert_decimals_to_fractions_to_percents_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/jewepa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8738/7037/files/19761690620.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/movikulewerudazuxedo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3346/8821/files/39322659673.pdf
    • https://cdn.shopify.com/s/files/1/0432/8026/9462/files/rudonawenoxunesakuluzex.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_off0000782d.bin
1a7e59d082672976fd8a7c4740c6753b9f2120b63791b6601a44d394845ce604		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782D 5380 bytes
font_01_sfnt_off00008a66.bin
becfa66b983ffc25bb2a3b5ae73f80b3678265db47de8c98af19f95d57d590a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A66 13312 bytes

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