Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b268aa9f7dfa8ba…

MALICIOUS

PDF

44.8 KB Created: 2020-08-10 09:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fab1655731366ada4a58279152e30207 SHA-1: c82566764ae7f3f8935b70db00e47140d968d6bb SHA-256: 8b268aa9f7dfa8bae7557c326147213949cb036ad5bd458c717d1bb52bb03be4
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector link to ttraff.ru, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains the same redirector URL and references a PDF related to 'all caste list in gujarat pdf', likely a lure to entice clicks. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.ru/pify?keyword=all+caste+list+in+gujarat+pdf
    • http://files.helengblake.com/uploads/1/3/1/3/131398066/momego-biwadidupiluva-wozinavifaz-xidefutajob.pdf
    • http://files.westwoodpubliclibrary.org/uploads/1/3/1/3/131382700/5076d56.pdf
    • http://files.katie-berger.com/uploads/1/3/2/7/132740633/rajim.pdf
    • http://files.aninvisiblethreadnovel.com/uploads/1/3/2/6/132681863/tefurolim-pegovezoluvidig-gesiberek.pdf
    • http://files.sixdownonetogo.com/uploads/1/3/2/7/132712508/rikavaruderu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3284/files/33452707065.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6946/files/numerical_linear_algebra_trefethen_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/50515556974.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevedizulav.pdf
    • https://cdn.shopify.com/s/files/1/0432/4494/5571/files/34744398103.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/benihana_happy_hour_menu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2457/2835/files/self_assessment_definition.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/25517688014.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9221/files/wifovoxasa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/11354071101.pdf
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/data_structures_and_algorithmic_thinking_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0435/0607/3759/files/mejeduxutipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/sabiwupupiriwudu.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d9f.bin
b87c450c22de8af7b6bd7803e27ac17d814ca9617e2e8db929d0a57b55e7e876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9F 5388 bytes
font_01_sfnt_off00006fff.bin
a8ba320a0ac8a73a5a8cc2c47ba30bd151ec5f51af4d5ac0b9daf85eaa8f1301		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FFF 1936 bytes
font_02_sfnt_off00007944.bin
d63209741a2343d18385f667a0164f3bcc5b69330ca8712603ae1b4d6e45373c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7944 14408 bytes

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