Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59c378421239777…

MALICIOUS

PDF

34.8 KB Created: 2020-08-19 03:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5598a79d53949ed9b65ff2a836ed9307 SHA-1: cfe8952e4001efe0dab4ef57822a8853190ca823 SHA-256: e59c378421239777183c8c3d62cd5b32e28cd2ca2d69bca8dd226140e432a0cf
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document is designed to lead users to harmful sites. The presence of a 'download button' lure further supports a malicious intent. The document body text is largely garbled, but the presence of a URL within it reinforces the link-based attack vector.

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/pify?keyword=gamit+ng+malaking+titik+worksheet+pdf
    • http://dalojemo.afdpc.org/uploads/1/3/1/4/131453215/jegixojaputovatera.pdf
    • http://files.rsitoy.com/uploads/1/3/0/7/130738801/muvagiribi.pdf
    • http://files.exsanguinationsignet.com/uploads/1/3/1/6/131606069/38e1874c713e7e0.pdf
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/73561134410.pdf
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/xifuvovajif.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/87613681636.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/kojimoluwep.pdf
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/bonalidejamozatimizufeze.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/sepsis_pathophysiology_and_clinical_management.pdf
    • https://cdn.shopify.com/s/files/1/0434/9050/8960/files/nesedu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/42512936390.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/53546443695.pdf
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/92715667884.pdf
    • https://cdn.shopify.com/s/files/1/0435/6158/2755/files/how_to_change_password_on_macbook.pdf
    • https://cdn.shopify.com/s/files/1/0462/8761/8209/files/westlife_music_with_lyrics_app.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_off00004923.bin
9bde508d53063a80d6f136fada8f89589603c15e98e37d20b9c4a5fefaee6d72
pdf-font-stream PDF embedded font (sfnt) at offset 0x4923 5644 bytes
font_01_sfnt_off00005c45.bin
f9f5c1dd90e4e3f3323e40fa52a72b2234de999d92c51864b7da4a5e399622a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C45 9996 bytes