Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e51adcdefe452e9…

MALICIOUS

PDF

41.8 KB Created: 2020-09-01 23:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dde18674d964d33147d030640bdea1cd SHA-1: dbd6fcdb3141109a9470c890226e4215e4133ad0 SHA-256: 5e51adcdefe452e9fd0299b1af27442bf1a323dd360212b2b7c4a52b046f3299
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains references to movie titles and URLs, suggesting a lure to attract users to click on the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

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/wix?keyword=bajirao+mastani+full+movie++720p+extramovies
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f8437bfbc26b424c91f8d9ba040621c6.pdf
    • https://static.usrfiles.com/ugd/67f5f7_9615fcde377f4bcc9897c1e7ce673826.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed9e2a0b14d3487f9d3a96d5b4c60e25.pdf
    • https://static.usrfiles.com/ugd/e2f197_1ec9224e5cbb4899aa96cf6be335afec.pdf
    • https://static.usrfiles.com/ugd/97aff7_71f9ce8f80a54203917a42b861574502.pdf
    • https://cdn.shopify.com/s/files/1/0468/1066/1018/files/fundamentals_of_structural_analysis_5th_edition_leet_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/El_archivo_contiene_caracteres_de_ta.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/best_jax_skin.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/pixejegolokem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6608/files/xijivenugomatov.pdf
    • https://cdn.shopify.com/s/files/1/0434/3028/1377/files/bruel_kjaer_pulse_labshop_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/1676/5087/files/2004_chevy_ssr_owners_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c75d12bd18d45daaf7b6b814430cbda.pdf
    • https://static.usrfiles.com/ugd/73c254_8904679aa1534371aa48fb058683d78f.pdf
    • https://static.usrfiles.com/ugd/f67134_806ead9d6541489ea79a95549f1c62fe.pdf
    • https://static.usrfiles.com/ugd/5af86b_80422d494a6042c292ca6e83fd655441.pdf
    • https://static.usrfiles.com/ugd/f84671_b9cf160fbc574b69b8b0a034962bda06.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f3.bin
d06ad7f232168368bca299b0c28721edef85c06a10815982dac6077c53df6569		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 5652 bytes
font_01_sfnt_off00007731.bin
a18c3b1d541ad977c25285bc0c40b7164f865226a1e9a9a53e79f740a4389e51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7731 10196 bytes

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