Malicious PDF — malware analysis report

Static analysis result for SHA-256 e50ab23c99a88be5…

MALICIOUS

PDF

40.7 KB Created: 2020-09-06 03:01:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 210ccfbe08f6702e3503efb47ef000ed SHA-1: f5a530ed55edf3cff329f16664e6cd3640f705d6 SHA-256: e50ab23c99a88be55ac412825c676b11d5217f208616d1e02fea74b9bc81d28c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, disguised as a piano sheet music download. The document body, though heavily obfuscated, contains this URL and numerous other links to Shopify and static.usrfiles.com domains, suggesting a link farm or redirection strategy. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a malicious URL.

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.me/pify?keyword=btob+only+one+for+me+piano+sheet
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/cna_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/80374071723.pdf
    • https://cdn.shopify.com/s/files/1/0433/4456/0281/files/bring_me_the_horizon_sleepwalking.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/the_duff_subtitles_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/61377132442.pdf
    • https://cdn.shopify.com/s/files/1/0440/5687/1062/files/gitarama_central_prison_is_located_i.pdf
    • https://static.usrfiles.com/ugd/be5703_6bdd6a13bd164616be112c9c0651c853.pdf
    • https://static.usrfiles.com/ugd/9c0842_14d594c1a4744e9cb71c364ced8748b5.pdf
    • https://static.usrfiles.com/ugd/3aee12_582fa60cc2cd4126b61ee6ac07669c4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_931200a67fff4940b176ef1a7a5e02f0.pdf
    • https://static.usrfiles.com/ugd/3e9e83_9ebf5b41f07f4658a95c2c3cfa64c343.pdf
    • https://static.usrfiles.com/ugd/22739b_de958cfd0d6a4f9cb65e7c7a1ed167b7.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_2f5bba0b59da47c1b2e1ed22418b921f.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000461a.bin
daa8dedc68386e7d7863f6ec3ed1850c77d0ed4a2b7c7dc7ed03c216e47630b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x461A 3916 bytes
font_01_sfnt_off000053fb.bin
c8fb10ee6033dd6f81a77e7079388b1855110be8940a30e673fc37fc69fcbe26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53FB 5220 bytes
font_02_sfnt_off00006580.bin
a809a49c4676435239939eebcbb6f5fe76392245cb0f9e57700a688b88297612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6580 9852 bytes
font_03_sfnt_off00008745.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8745 4324 bytes

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