Malicious PDF — malware analysis report

Static analysis result for SHA-256 67962e509aa72d76…

MALICIOUS

PDF

69.1 KB Created: 2020-08-09 07:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58961edb0d0652c364791b6fb287a9ea SHA-1: 19945de7870b9706566c582e0f57c4677f224223 SHA-256: 67962e509aa72d7667c72fed72ee5239f7a250f033e6e4a1c7d71c0fe11a4eac
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The primary malicious URL identified is https://ttraff.cc/pify?keyword=sri+narasimha+kavacham+in+telugu+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to these URLs and appears to be an attempt to manipulate search engine results for the term 'sri narasimha kavacham in telugu pdf'.

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.cc/pify?keyword=sri+narasimha+kavacham+in+telugu+pdf
    • http://files.whitburnforum.co.uk/uploads/1/3/1/4/131407135/1079051.pdf
    • http://files.ambcircleoffriends.com/uploads/1/3/2/3/132303001/2152254.pdf
    • http://files.amandaschupak.com/uploads/1/3/1/3/131384071/gafutitu.pdf
    • http://xuluwetev.gas-strengthconditioning.com/uploads/1/3/0/7/130776485/valadomen.pdf
    • http://files.excellenteagle.com/uploads/1/3/1/8/131871720/novasiz.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/voxepilabagaxivav.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/bepotebawewadezexatakab.pdf
    • https://cdn.shopify.com/s/files/1/0433/9354/8444/files/zinozimelemodarumex.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/1595924585.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91025233068.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/60143840836.pdf
    • https://cdn.shopify.com/s/files/1/0439/7708/0990/files/english_speaking_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/jitanuluwalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9776/8614/files/zegoxepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1939/files/31182931550.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000d91b.bin
e22ce41fd605d914cc25fc9ba60ddabb360d3d38ce0e5f37f646365edb2889f5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD91B 14748 bytes
font_00_sfnt_off00008936.bin
985127caff858041bea412e283042b2a70281ae5f83701311950d41a103b47ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8936 5796 bytes
font_01_sfnt_off00009cd2.bin
240b01ea4caa45f57f54ab4d6d5eb6187b906162b2682bc4dcfb9155b206388d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD2 3772 bytes
font_02_sfnt_off0000a878.bin
bf69d9b64bb7f0f280d9aa4c4a347a7a540ce7de9698d11abd5b4307abfeb3cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA878 15572 bytes

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