Malicious PDF — malware analysis report

Static analysis result for SHA-256 1255de17a6c91889…

MALICIOUS

PDF

56.7 KB Created: 2020-09-05 15:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 340bcd51edaaec8f22fb6d899ea4a0cf SHA-1: 5d0eb78bc43be52d7d6687a66d3651a225d38a4e SHA-256: 1255de17a6c918895f246deda7fdcd95f5c8918a158ca9c005412a8e1d01093c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is disguised as sheet music. This indicates a likely phishing or malware distribution attempt. The PDF also contains a large number of external links, suggesting it's part of a link farm designed to manipulate search engine results or distribute malicious content. No scripts were extracted, but the presence of malicious URLs and the document's deceptive content strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=dark+fur+elise+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5899d5_03b7421ddd704de2801c04cc4f47c529.pdf
    • https://static.usrfiles.com/ugd/ea78e0_c9f641aebf604fd493de5f846698574d.pdf
    • https://static.usrfiles.com/ugd/f99735_7fb22df343cf4fe6bfb5827fe326ffa8.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/reduce_file_size_below_500kb_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/lotewegabezoxigusemani.pdf
    • https://static.usrfiles.com/ugd/9cb927_9172514902fa40dead0f718b54da5648.pdf
    • https://static.usrfiles.com/ugd/a467d2_e0add805f3694a68a6953565d5a410b2.pdf
    • https://static.usrfiles.com/ugd/4b68be_585236022f2b4cdcb457c325c4e0aa83.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_off000059e0.bin
1ca33d9e4c0b9bd7484e25250236a2548966adcfc0c833ca3503b42b6e625fa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x59E0 19328 bytes
font_01_sfnt_off000096a1.bin
2796519a351b6cfe590cbef6c7da5a66ba33b726f001c31b39939adc787f534e
pdf-font-stream PDF embedded font (sfnt) at offset 0x96A1 5184 bytes
font_02_sfnt_off0000a826.bin
802d3c92883ed4c20f4c331e01ef68a4a6f14ad6cb6cb384b4a0fe39b063358b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA826 14992 bytes