Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2d7eba51324d9a0…

MALICIOUS

PDF

44.9 KB Created: 2020-07-13 00:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2a4fad95f676e997c693af4eda40c7f SHA-1: 0b63b80f933a67ee9eba648b53577ace15ee41de SHA-256: f2d7eba51324d9a07a162df859ce8df61ee0964534e7b94600eccd3ee7558aca
212 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=how+to+make+edible+water+balls'. This indicates the document's primary purpose is to redirect users to potentially harmful content. ClamAV also detected the file as 'Pdf.Dropper.Agent-9054128-0', further confirming its malicious nature. The ML classifier also strongly flagged this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9054128-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9054128-0
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=how+to+make+edible+water+balls
    • http://files.lacuralifestyle.com/uploads/1/3/0/7/130738919/6d71d15ffc0.pdf
    • http://files.boyter.com/uploads/1/3/1/6/131636995/b75a5b71.pdf
    • http://files.burhanisawmills.com/uploads/1/3/0/7/130776123/6b99129932836.pdf
    • http://files.sjlcknox.org/uploads/1/3/1/8/131857679/wafuluwad_nobekakorifuwa.pdf
    • https://wurumopo.files.wordpress.com/2020/06/57892443149.pdf
    • https://ralowigi.files.wordpress.com/2020/07/46000517494.pdf
    • https://xipolinev.files.wordpress.com/2020/07/21320404698.pdf
    • https://soxepibox.files.wordpress.com/2020/06/58049585352.pdf
    • https://negoxojes.files.wordpress.com/2020/06/temazowi.pdf
    • https://gusufib.files.wordpress.com/2020/06/97561431435.pdf
    • https://somotug.files.wordpress.com/2020/07/95808092426.pdf
    • https://gixutuxurugu.files.wordpress.com/2020/07/94536442851.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/moreluliwifigaludexab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/biludetejuvujatolometa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/firug.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetelonum.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/32072053368.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/26806102785.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/tudunon.pdf
    • https://cdn.shopify.com/s/files/1/0427/5961/8716/files/pewabogagowoxakafofosu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/kijonen.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8340/files/90012242261.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/
    • https://negoxojes.files.wordpress.com/2020/06/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071ce.bin
53ffd7180c8385770fe27a90c3b1df278e04840d103c67e678a6cfda47b6f9f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CE 4912 bytes
font_01_sfnt_off00008287.bin
10b819191da8968e7f4d32c6b99cc608b9fbb4f0c7574647b3145a46e9747c3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8287 10492 bytes

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