Malicious PDF — malware analysis report

Static analysis result for SHA-256 11276f663bbdcc3a…

MALICIOUS

PDF

125.3 KB Created: 2020-08-06 17:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8082081e325584d4589823d03ef1920 SHA-1: 4d693a021d802d98330d21642aa53cf8174c6a49 SHA-256: 11276f663bbdcc3a449860ecc23bad7a19095d7e6e2cc33a4cece6ea3b5a52ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=chinese+alphabet+a+z+pdf'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect the user to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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=chinese+alphabet+a+z+pdf
    • http://files.jopatti.com/uploads/1/3/1/6/131607075/kegegas-gemaxex-vurux-bawezisof.pdf
    • http://files.breizh-amerika.com/uploads/1/3/0/7/130776602/8f061.pdf
    • http://files.schsprojectgraduation.com/uploads/1/3/0/8/130814402/pizono.pdf
    • http://files.hayed.org/uploads/1/3/1/8/131856333/3598016.pdf
    • http://wuwuxofo.mrsgant.org/uploads/1/3/1/4/131407227/zivorinomelosojumeli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/vuxudovu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9181/0717/files/lightest_reader_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/1868/1496/files/kijekejepobatizavogu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6776/0028/files/want_to_edit_file_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/1400/3610/files/mysql_list_databases.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3334/files/lizifosajokum.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/85483214950.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/40837738923.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4524/files/vusuzokiwip.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/59070985105.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/38307293816.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/okami_warriors_sekiro.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e990.bin
a601a9abc8e9e3b5695153af407ba3d244fc2f4f74ef8f96013568b988611c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 50976 bytes
font_01_sfnt_off000183a4.bin
ceb81262f07eb70f3ff16327a43117764bf54656f433123c8e355d2164331a16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x183A4 5128 bytes
font_02_sfnt_off00019509.bin
b15353c3a95bc3a9e1506e0cb0b4502d284e37fc0aec159028c441e94a5e866e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19509 4832 bytes
font_03_sfnt_off0001a660.bin
ca562e630ec420300a6fa39fcd9e5a131504127496024a09c1f7176294d81722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A660 14972 bytes
font_04_sfnt_off0001d24a.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D24A 16036 bytes

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