Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73b2a29fae67832…

MALICIOUS

PDF

53.8 KB Created: 2020-07-27 05:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29247b2256cbe0ab3761252ca97a2a24 SHA-1: 30a219b43d7cae826174c8253fd00441880675cc SHA-256: e73b2a29fae67832d5cebd4d87ede1d6fa3f5f32a7282b2c0c4a4a5ff9e3b86d
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to a known malicious redirector. The primary malicious IOC is the URL 'https://ttraff.com/pify?keyword=aarti+bhajan++free', which is likely used to funnel users to a harmful destination. The document body appears to be heavily obfuscated or corrupted, preventing a clear understanding of its content beyond the presence of the malicious link.

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=aarti+bhajan++free
    • http://files.joellesolomon.com/uploads/1/3/0/7/130775968/f31b6d3.pdf
    • http://files.workpurposefully.org/uploads/1/3/0/9/130969543/ea6ec52f54ab8.pdf
    • http://files.fasystech.com/uploads/1/3/0/9/130970009/cf541816d7.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/79506094736.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/5696216468.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/86281559892.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/16467507949.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/87624195027.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/81454119871.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/senipir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/noperebipifegaluzoba.pdf
    • https://cdn.shopify.com/s/files/1/0429/0589/5075/files/wofuxabijokisatifunexejol.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/bukapikixiput.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000892a.bin
1e3b5a4aadf502de9ddec9948dce40df4f79d1e8bcb3d8c4e1c99c6053d35b30
pdf-font-stream PDF embedded font (sfnt) at offset 0x892A 4528 bytes
font_01_sfnt_off0000987b.bin
647142fb7c702cdc93a65254bdbffd973d3ad11b0a3b44ce0c5bb7e7b4d74b6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x987B 10348 bytes
font_02_sfnt_off0000bb39.bin
3aafa9ad69fd50664c34448a9056076ee78be0c8938d4e3bb1fce68207d686d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB39 3856 bytes