Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec8e4d9176797fe2…

MALICIOUS

PDF

40.9 KB Created: 2020-08-21 14:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9706e003b8d7df3ac4b6fab00a88e187 SHA-1: 4ca0e52b1be0ec547112d34adcde5e69e83b07fe SHA-256: ec8e4d9176797fe21cc04bf51524533bf1f414bc8cfe7c57d5ebabc86e0a416f
150 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link. The document contains a link farm of 14 external PDF files, with one link pointing to `https://ttraff.cc/pify?keyword=family+budget+sample+pdf`. This suggests a phishing or malicious redirection attempt, likely to lure users to further malicious content. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=family+budget+sample+pdf
    • http://files.fansherportfolio.com/uploads/1/3/2/8/132815045/zolis.pdf
    • http://melanadud.mrsdsmithsthirdgrade.com/uploads/1/3/1/4/131483281/eceec70b36.pdf
    • https://cdn.shopify.com/s/files/1/0440/0755/5222/files/45185294209.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/avast_free_antivirus_definition_update.pdf
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/gusewedin.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/rokosavaku.pdf
    • https://cdn.shopify.com/s/files/1/0429/4885/3926/files/kawegipepofedanef.pdf
    • https://cdn.shopify.com/s/files/1/0431/7216/7841/files/57187507890.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/bending_moment_and_shear_force_of_beams.pdf
    • https://cdn.shopify.com/s/files/1/0431/1095/7210/files/camp_granada_song.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/beketajebekufibodasagazot.pdf
    • https://cdn.shopify.com/s/files/1/0433/2254/0185/files/49139028351.pdf
    • https://cdn.shopify.com/s/files/1/0428/4222/6854/files/metere.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/alcoholismo_fetal.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_off00006087.bin
9bd3a3e3dbfca746da42a533c0c9f6d87fa185c7e6e75bdaa60999a1011ed587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6087 5464 bytes
font_01_sfnt_off00007315.bin
9a2a7b9af57f790cdc94ed8d5b020e245c6b1a9b6c3d0a4f6ed280af15ad084b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7315 10564 bytes

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