Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7c6ecca19c5ad8…

MALICIOUS

PDF

57.2 KB Created: 2020-08-05 15:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e02047cece6c87bf54e50b4de2d5ff2 SHA-1: 598d6b0dd0922b731865aa56d525d56cd6ab8397 SHA-256: 0b7c6ecca19c5ad81d1397285206ee249741712a7ea6f51c28532da2b9fb73bc
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with the primary one leading to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a Ramadan calendar and the URL that was flagged as malicious. The presence of numerous external PDF links suggests a link farm or redirection strategy, likely to distribute further malicious content or engage in SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=ramadan+2020+calendar+south+africa+pdf
    • http://files.oldhamtinkers.com/uploads/1/3/1/1/131163902/zepabijon-tawexajogopuw.pdf
    • http://files.hermanus-festivals.com/uploads/1/3/0/9/130970004/842bb774068.pdf
    • http://files.harveyhensley.com/uploads/1/3/1/6/131606011/kekefa.pdf
    • http://files.heatherbrittonphotography.com/uploads/1/3/0/8/130815026/e78fdfbe.pdf
    • http://files.taylorheasleyphotography.com/uploads/1/3/2/6/132696598/xunaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2956/0486/files/disk_utility_first_aid.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/pitumuxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9528/4130/files/iliza_shlesinger_war_paint.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/xazizakoxikimugusen.pdf
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/creatinine_clearance_test_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/cpu_temp_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7137/files/gilenebixa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/jemolobovinojokiguvo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/auto_clicker_gary.pdf
    • https://cdn.shopify.com/s/files/1/0431/2072/2080/files/82362000959.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/60795174658.pdf
    • https://cdn.shopify.com/s/files/1/0437/0835/0619/files/busch_gardens_park_map.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d9f.bin
c305e7f5f065d22bf22a56ae718876eadd2acfca1bdf3abf8d4672f22258db4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9F 5676 bytes
font_01_sfnt_off000080be.bin
a8ba320a0ac8a73a5a8cc2c47ba30bd151ec5f51af4d5ac0b9daf85eaa8f1301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80BE 1936 bytes
font_02_sfnt_off00008a03.bin
5d0617903e90b1460d453e9da302f0b25fb742c63067087001f2c296c6d4633d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A03 14700 bytes
font_03_sfnt_off0000b6f2.bin
723d3ef04778c26cfdb1a7a7c7958c16c7284b8822d0dac7ae16e41824dcf7c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F2 18884 bytes

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