Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1dd0d62157440c…

MALICIOUS

PDF

45.5 KB Created: 2020-09-09 23:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51b94c08d00c6d100a4aca7e34651b0e SHA-1: 2d7b964cc0439f6f37047f75a67947dfbf71ac9b SHA-256: 6a1dd0d62157440c7f44223c3e692b92390a359cc590aeadb56a99e5b0477fe8
154 Risk Score

Malware Insights

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

The PDF contains a lure related to a movie download, which directs users to a suspicious URL. This URL is identified as a malicious redirector, indicating an attempt to lead the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=anaconda+tamil+movie+part+2
    • http://bytlly.com/1d1jd6Us
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/74e9cf_5b24e2baf372486aa34e4a949d642025.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_412a95d745124ce29b360f65625854dc.pdf
    • https://static.usrfiles.com/ugd/bfd78a_e386befa44474f48b21068cad081aaad.pdf
    • https://static.usrfiles.com/ugd/3e87bf_8447f59b41964e8b9b7117c67f811288.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/tumokijejuxudonanobifij.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/garuramasokevu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9895/files/80551232758.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/contoh_undangan_yasinan.pdf
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/83422235220.pdf
    • https://cdn.shopify.com/s/files/1/0439/2642/1672/files/design_portfolio_template_ai.pdf
    • https://cdn.shopify.com/s/files/1/0437/4665/6408/files/98848697504.pdf
    • https://cdn.shopify.com/s/files/1/0434/0970/3061/files/66718183968.pdf
    • https://cdn.shopify.com/s/files/1/0461/9413/1093/files/49738703974.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1373/files/bootstrapping_a_nonparametric_approach_to_statistical_inference.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5285/files/samsung_voice_recorder_for_any_android.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000692b.bin
e26d15e5b5e0e215f3f63271e9b19957d4aead7723be61714977bd9f8112b36f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x692B 5220 bytes
font_01_sfnt_off00007ad9.bin
c206ac4eca120f096112d408dff6b33a2f721090936d80486df636e1cd240fde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD9 2656 bytes
font_02_sfnt_off000085e1.bin
0be4fabcabae79a12e548e3e6bc224a2e355ad302c8ab1a09205d15b7ffb4e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85E1 10204 bytes

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