Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9beee61085f0eb…

MALICIOUS

PDF

56.9 KB Created: 2020-08-05 14:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bfe3a314b8816c2cdd08af0daa01874 SHA-1: fe9275513509f0a8cc5b3a46c312a4e74b527f6b SHA-256: 4e9beee61085f0eb76d955c7381006520b74dc774576186deeee2bdffd9f4a47
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is embedded within the document body, disguised as a 'Tata sky tamil channel number list pdf 2020'. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting PDF files. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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=tata+sky+tamil+channel+number+list+pdf+2020
    • http://files.tienyue.com/uploads/1/3/2/6/132683292/sogijitoburiw_suvunek.pdf
    • http://files.khantara.com/uploads/1/3/2/6/132682640/rozazagemiger-vovofevibimuda.pdf
    • http://files.celianeri.com/uploads/1/3/1/6/131636954/poradike.pdf
    • http://files.nutmeg-labradoodles.com/uploads/1/3/1/6/131636941/sisipoj_xemami.pdf
    • https://cdn.shopify.com/s/files/1/0438/0586/8193/files/marvel_avengers_the_ultimate_character_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/xebisuvoganedudojatefula.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0946/files/19087908553.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/giwogiwepugesemazuvuwane.pdf
    • https://cdn.shopify.com/s/files/1/0428/5369/5647/files/46887393517.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7113/files/color_blindness_test_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/bose_soundlink_mini_ii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9465/4632/files/zafibewufexixo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/4263420215.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/fizodumoxewodapiguwuvi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/organic_structure_analysis_crews_free_download.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://cdn.shopify.com/s/files/1/0438/0586/8193/files/marvel_avengers_the_ultimate_character_g

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009200.bin
204ecd1e5f21b08b86a13536036c6d6d81b4ecaffcc90acee3cf2d512f3b6a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9200 5924 bytes
font_01_sfnt_off0000a608.bin
2be839d0e7de6d4d3edbea1f59f2d872e22df766d30623606d4b14101166a76a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA608 15556 bytes

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