Malicious PDF — malware analysis report

Static analysis result for SHA-256 9225f643ff34c1f0…

MALICIOUS

PDF

40.9 KB Created: 2020-08-05 18:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d808810f0762aa993fcf0b03300488c SHA-1: 142b8ce6c471124a3f891f27517a828617837cfb SHA-256: 9225f643ff34c1f0f34ff7edb15004c5bd0858083d290006605ed5cec3d24495
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=acm+icpc+2020+problems+pdf'. This URL is presented within the document body, disguised as a link to 'acm icpc 2020 problems pdf'. The file also contains a large number of external PDF links, many hosted on shopify.com, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, and the document body is heavily obfuscated, but the primary intent appears to be redirecting the user to malicious infrastructure.

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.com/pify?keyword=acm+icpc+2020+problems+pdf
    • http://files.saintpaulcatholicchurchpocahontas.com/uploads/1/3/2/7/132740865/9848483.pdf
    • http://parexa.diypaintguy.com/uploads/1/3/0/7/130775734/kirajimivo_dasotefez_firulomiwuv_pinudulebuz.pdf
    • http://files.3haivhmoob.com/uploads/1/3/1/8/131856435/sopavodor_xebok_meputesomiko.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/54171384769.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/xeduvaliletebidimufewa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19194700937.pdf
    • https://cdn.shopify.com/s/files/1/0441/1555/8552/files/cantaloupe_island_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/kesonuwetaxaloruk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/taralobadetatadedetipil.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/60280075500.pdf
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/weveroxejurufa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/xifewitewuzij.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/20719708884.pdf
    • https://cdn.shopify.com/s/files/1/0431/3091/2934/files/96262992924.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/nobamip.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_off0000602b.bin
0127fe0a1ee965903b8bd320674fff06ae428ec91e9fdb658563bde7072866f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 5492 bytes
font_01_sfnt_off000072c4.bin
9be8b9543b7e9df5959be40405ec326644521642ea851088a09db3c404b55756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 10572 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.