Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ee8c6b53eb9cd0…

MALICIOUS

PDF

44.0 KB Created: 2020-08-10 03:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac1a44b7539c64c977b564d73fc336a5 SHA-1: 078a55b8973f960f23a768f26b433362537fdde0 SHA-256: 61ee8c6b53eb9cd07c8997ad20148f35f65de75b05bedbc653e6aa87e6e957a3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains this URL, suggesting an attempt to lure users to a malicious site under the guise of providing practice exams.

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=barron+s+toeic+practice+exams+6+tests+pdf
    • http://files.wisedemocracy.org/uploads/1/3/1/6/131636872/895d82c10b.pdf
    • http://vixifi.ladyannestrunkomaha.com/uploads/1/3/1/0/131070450/d8ef34dacd4fd4.pdf
    • http://files.jasminequill.com/uploads/1/3/0/9/130969218/128c160a6de68.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0438/2805/2130/files/street_dance_2_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/2015_2016_nfl_playoffs.pdf
    • https://cdn.shopify.com/s/files/1/0432/9239/3640/files/buku_rangkuman_biologi_sma.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/81404865677.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/pijiredudimuwogisoge.pdf
    • https://cdn.shopify.com/s/files/1/0428/8810/2051/files/advertising_discord_servers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3390/2760/files/40470113316.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6485/files/megutuko.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3932/files/mcquay_centrifugal_chiller_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/vizova.pdf
    • https://cdn.shopify.com/s/files/1/0436/0624/5539/files/42776600478.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.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ee6.bin
d4633149f5bf722b30a05065e6397a611eae6b6cbc8df0ed2ade22e9413ae61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE6 5540 bytes
font_01_sfnt_off000061a3.bin
b8f9bece1d0f176ddb4eddb29b78f74402db96674c2b1d2c068fc96eb1b92d21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 11352 bytes
font_02_sfnt_off00008130.bin
7d5a1e409ad93981a399a469aa731e1bc14d7cccb3a037eb57265a197082f81a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8130 9744 bytes

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